research papers
The maximum entropy method (MEM) has been used to determine electron density in superspace of incommensurately modulated chromium pyrophosphate from X-ray diffraction data measured by Palatinus et al. [(2006), Acta Cryst. B62, 556–566]. Chromium pyrophosphate, Cr2P2O7, contains ordered regions (83% of the volume) and regions with disorder. Analysis of the MEM density has allowed the determination of the displacive modulation functions within ordered regions. The disordered regions can be described as the alternate occupation of two conformations of the pyrophosphate group and two positions of the chromium atom, with occupational probabilities that depend continuously on the phase of modulation t. A structure model based on the interpretation of the MEM density provides a fit to the diffraction data of the same quality as the model given by Palatinus et al. (2006). The failure to find a model that better fits the data is attributed to the intrinsic inaccuracy of ∼ 0.01 Å for positions derived from the MEM and to the difficulties in constructing an appropriate model for the anharmonic ADPs and their modulation functions from electron densities.
Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S0108768110003393/bp5028sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108768110003393/bp5028Isup2.hkl | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108768110003393/bp5028Bsup3.hkl | |
Structure factor file (CIF format) https://doi.org/10.1107/S0108768110003393/bp5028Msup4.hkl |
Computing details top
For all structures, program(s) used to refine structure: Jana2006 (Petricek, Dusek & Palatinus, 2006); software used to prepare material for publication: Jana2006 (Petricek, Dusek & Palatinus, 2006).
(I) top
Crystal data top
Cr2O7P2 | V = 258.71 Å3 |
Mr = 277.9 | Z = 2 |
Monoclinic, C2/m(α0γ)1s† | F(000) = 268 |
q = -0.36100a* + 0.47100c* | Dx = 3.567 Mg m−3 |
a = 7.0192 Å | Mo Kα radiation, λ = 0.71069 Å |
b = 8.4063 Å | µ = 4.80 mm−1 |
c = 4.6264 Å | T = 293 K |
β = 108.6111° |
† Symmetry operations: (1) x1, x2, x3, x4; (2) −x1, x2, −x3, −x4+1/2; (3) −x1, −x2, −x3, −x4; (4) x1, −x2, x3, x4+1/2; (5) x1+1/2, x2+1/2, x3, x4; (6) −x1+1/2, x2+1/2, −x3, −x4+1/2; (7) −x1+1/2, −x2+1/2, −x3, −x4; (8) x1+1/2, −x2+1/2, x3, x4+1/2. |
Data collection top
Radiation source: X-ray tube | 2409 independent reflections |
Absorption correction: gaussian CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.27p5 beta Analytical numeric absorption correction using a multifaceted crystal model. | 1433 reflections with I > 3σ(I) |
Tmin = 0.435, Tmax = 0.677 |
Refinement top
Refinement on F | 46 constraints |
R[F2 > 2σ(F2)] = 0.022 | Weighting scheme based on measured s.u.'s w = 1/(σ2(F) + 0.0004F2) |
wR(F2) = 0.057 | (Δ/σ)max = 0.0003 |
S = 1.58 | Δρmax = 0.48 e Å−3 |
2409 reflections | Δρmin = −0.47 e Å−3 |
170 parameters | Extinction correction: B-C type 1 Gaussian isotropic (Becker & Coppens, 1974) |
0 restraints | Extinction coefficient: 620 (100) |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
x | y | z | Uiso*/Ueq | Occ. (<1) | |
P | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.00636 (19) | 0.4157 (14) |
P(a) | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.0165 (17) | 0.0421 (7) |
P(b) | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.0114 (16) | 0.0421 (7) |
O1 | 0.63754 (19) | 0 | 0.2775 (3) | 0.0089 (4) | |
O2 | 1 | −0.0644 (3) | 0.5 | 0.0179 (6) | 0.4157 (14) |
O2(a) | 1.0014 (13) | −0.0545 (9) | 0.532 (2) | 0.027 (3) | 0.0421 (7) |
O3 | 0.80628 (16) | −0.14636 (13) | 0.7591 (3) | 0.0130 (3) | |
O3(a) | 0.8438 (15) | −0.1466 (13) | 0.729 (2) | 0.030 (4) | 0.0421 (7) |
O3(b) | 0.7622 (11) | −0.1517 (11) | 0.772 (2) | 0.001 (2) | 0.0421 (7) |
Cr | 0.5 | −0.18798 (6) | 0 | 0.00790 (15) | |
Cr(a) | 0.4749 (11) | −0.1898 (3) | 0.019 (2) | 0.0113 (14) | 0.0423 (8) |
Atomic displacement parameters (Å2) top
U11 | U22 | U33 | U12 | U13 | U23 | |
P | 0.0053 (3) | 0.0074 (3) | 0.0052 (3) | −0.00064 (18) | 0 | −0.0012 (3) |
P(a) | 0.003 (2) | 0.027 (3) | 0.017 (3) | 0.009 (2) | 0.000 (2) | 0.010 (3) |
P(b) | 0.013 (2) | 0.010 (2) | 0.006 (3) | −0.005 (2) | −0.004 (2) | 0.021 (3) |
O1 | 0.0096 (7) | 0.0069 (6) | 0.0083 (7) | 0 | 0.0000 (5) | 0 |
O2 | 0.0090 (9) | 0.0233 (11) | 0.0236 (10) | 0 | 0.0081 (7) | 0 |
O2(a) | 0.011 (3) | 0.054 (6) | 0.021 (4) | −0.004 (5) | 0.015 (3) | −0.013 (5) |
O3 | 0.0152 (6) | 0.0099 (5) | 0.0110 (5) | 0.0027 (4) | 0.0002 (4) | 0.0026 (4) |
O3(a) | 0.036 (7) | 0.021 (5) | 0.016 (5) | 0.009 (5) | −0.016 (5) | −0.005 (4) |
O3(b) | −0.002 (4) | 0.001 (3) | 0.002 (3) | 0.004 (3) | −0.003 (3) | 0.000 (2) |
Cr | 0.0083 (2) | 0.0051 (2) | 0.0073 (2) | 0 | −0.00179 (14) | 0 |
Cr(a) | 0.016 (3) | 0.0040 (7) | 0.010 (2) | −0.0014 (8) | −0.0012 (16) | 0.0006 (9) |
Geometric parameters (Å, º) top
Average | Minimum | Maximum | |
P—O1 | 1.5348 (16) | 1.5213 (16) | 1.5423 (16) |
P—O1i | 3.389 (2) | 3.288 (2) | 3.449 (2) |
P—O2 | 1.597 (3) | 1.553 (3) | 1.640 (3) |
P—O3 | 1.516 (4) | 1.495 (4) | 1.537 (4) |
P—O3ii | 3.491 (3) | 3.466 (3) | 3.582 (3) |
P—O3iii | 3.468 (4) | 3.378 (4) | 3.498 (4) |
P—O3iv | 3.542 (4) | 3.454 (4) | 3.737 (4) |
P—O3v | 3.253 (4) | 3.202 (4) | 3.320 (4) |
P—O3vi | 1.484 (4) | 1.461 (4) | 1.500 (4) |
Cr—O1 | 2.080 (2) | 2.051 (2) | 2.106 (3) |
Cr—O1vii | 2.080 (2) | 2.051 (2) | 2.106 (3) |
Cr—O2viii | 3.193 (6) | 3.093 (5) | 3.396 (5) |
Cr—O2v | 3.190 (6) | 3.093 (5) | 3.395 (5) |
Cr—O3ix | 2.708 (4) | 2.380 (5) | 3.428 (4) |
Cr—O3 | 3.513 (3) | 3.489 (3) | 3.544 (3) |
Cr—O3vii | 3.513 (3) | 3.489 (3) | 3.544 (3) |
Cr—O3i | 2.716 (4) | 2.380 (5) | 3.428 (4) |
Cr—O3x | 3.950 (4) | 3.594 (4) | 4.084 (4) |
Cr—O3v | 2.024 (4) | 1.974 (4) | 2.049 (4) |
Cr—O3xi | 3.946 (4) | 3.594 (4) | 4.084 (4) |
Cr—O3xii | 2.024 (4) | 1.974 (4) | 2.049 (4) |
O1—P—O1i | 71.57 (8) | 68.12 (8) | 75.16 (8) |
O1—P—O2 | 105.03 (9) | 99.57 (9) | 109.88 (9) |
O1—P—O3 | 111.24 (14) | 110.09 (14) | 112.45 (14) |
O1—P—O3ii | 164.43 (9) | 162.73 (9) | 165.49 (9) |
O1—P—O3iii | 62.67 (8) | 61.34 (8) | 64.99 (8) |
O1—P—O3iv | 91.80 (9) | 87.35 (9) | 96.30 (9) |
O1—P—O3v | 65.47 (8) | 64.72 (8) | 66.62 (8) |
O1—P—O3vi | 111.48 (14) | 110.74 (14) | 114.29 (15) |
O1i—P—O2 | 164.8 (4) | 162.5 (4) | 168.2 (4) |
O1i—P—O3 | 66.44 (15) | 65.34 (15) | 69.78 (15) |
O1i—P—O3ii | 106.69 (8) | 105.73 (8) | 109.00 (8) |
O1i—P—O3iii | 89.39 (7) | 86.62 (7) | 94.32 (8) |
O1i—P—O3iv | 151.59 (7) | 149.68 (7) | 155.83 (6) |
O1i—P—O3v | 89.02 (8) | 83.42 (8) | 99.29 (8) |
O1i—P—O3vi | 82.65 (16) | 75.25 (16) | 86.72 (16) |
O2—P—O3 | 103.1 (3) | 101.0 (3) | 105.4 (3) |
O2—P—O3ii | 72.64 (11) | 66.69 (13) | 76.97 (12) |
O2—P—O3iii | 101.8 (3) | 92.8 (2) | 105.1 (2) |
O2—P—O3iv | 40.4 (3) | 33.3 (2) | 43.0 (3) |
O2—P—O3v | 76.7 (3) | 69.9 (3) | 79.6 (2) |
O2—P—O3vi | 111.4 (3) | 110.6 (3) | 112.3 (3) |
O3—P—O3ii | 55.86 (14) | 53.58 (14) | 57.14 (13) |
O3—P—O3iii | 155.15 (17) | 153.07 (17) | 163.10 (18) |
O3—P—O3iv | 141.93 (16) | 134.39 (16) | 144.76 (16) |
O3—P—O3v | 62.35 (15) | 59.62 (15) | 66.57 (15) |
O3—P—O3vi | 113.9 (2) | 112.7 (2) | 114.9 (2) |
O3ii—P—O3iii | 132.76 (8) | 131.53 (8) | 134.81 (8) |
O3ii—P—O3iv | 95.31 (9) | 90.64 (9) | 97.58 (9) |
O3ii—P—O3v | 99.13 (9) | 97.24 (9) | 100.82 (8) |
O3ii—P—O3vi | 83.19 (14) | 82.48 (14) | 84.97 (14) |
O3iii—P—O3iv | 62.28 (9) | 61.62 (9) | 64.90 (9) |
O3iii—P—O3v | 125.58 (8) | 123.40 (9) | 127.01 (8) |
O3iii—P—O3vi | 54.57 (15) | 53.44 (15) | 57.01 (15) |
O3iv—P—O3v | 104.97 (10) | 94.92 (10) | 110.22 (10) |
O3iv—P—O3vi | 82.33 (18) | 78.74 (18) | 90.17 (17) |
O3v—P—O3vi | 171.90 (17) | 169.49 (17) | 177.47 (15) |
O1—Cr—O1vii | 79.97 (9) | 78.90 (8) | 81.47 (8) |
O1—Cr—O2viii | 141.29 (11) | 138.84 (11) | 147.92 (10) |
O1—Cr—O2v | 96.17 (15) | 94.16 (16) | 100.07 (14) |
O1—Cr—O3ix | 83.84 (10) | 76.20 (9) | 89.27 (11) |
O1—Cr—O3 | 44.68 (7) | 44.04 (7) | 45.23 (7) |
O1—Cr—O3vii | 123.74 (10) | 121.91 (10) | 125.22 (9) |
O1—Cr—O3i | 85.74 (10) | 79.31 (9) | 90.95 (11) |
O1—Cr—O3x | 57.50 (8) | 52.16 (7) | 63.98 (8) |
O1—Cr—O3v | 95.21 (11) | 92.83 (11) | 97.03 (11) |
O1—Cr—O3xi | 55.71 (8) | 50.61 (8) | 62.25 (8) |
O1—Cr—O3xii | 165.18 (14) | 160.25 (15) | 169.28 (14) |
O1vii—Cr—O2viii | 96.08 (15) | 94.16 (16) | 100.04 (15) |
O1vii—Cr—O2v | 141.23 (11) | 138.84 (11) | 147.88 (10) |
O1vii—Cr—O3ix | 85.88 (10) | 79.31 (9) | 90.95 (11) |
O1vii—Cr—O3 | 123.70 (10) | 121.91 (10) | 125.22 (9) |
O1vii—Cr—O3vii | 44.68 (7) | 44.04 (7) | 45.23 (7) |
O1vii—Cr—O3i | 83.70 (10) | 76.19 (9) | 89.27 (11) |
O1vii—Cr—O3x | 55.62 (8) | 50.61 (8) | 62.25 (8) |
O1vii—Cr—O3v | 165.25 (14) | 160.25 (15) | 169.29 (14) |
O1vii—Cr—O3xi | 57.58 (8) | 52.16 (7) | 63.98 (8) |
O1vii—Cr—O3xii | 95.21 (11) | 92.82 (11) | 97.03 (11) |
O2viii—Cr—O3ix | 62.36 (10) | 61.23 (11) | 64.41 (10) |
O2viii—Cr—O3 | 129.94 (10) | 126.96 (9) | 132.32 (9) |
O2viii—Cr—O3vii | 58.14 (10) | 54.51 (11) | 59.29 (11) |
O2viii—Cr—O3i | 128.61 (11) | 125.32 (12) | 130.22 (11) |
O2viii—Cr—O3x | 146.14 (8) | 143.02 (6) | 152.73 (8) |
O2viii—Cr—O3v | 77.34 (15) | 74.49 (14) | 78.11 (13) |
O2viii—Cr—O3xii | 49.78 (14) | 46.30 (14) | 51.37 (13) |
O2v—Cr—O3ix | 128.64 (11) | 125.34 (12) | 130.22 (11) |
O2v—Cr—O3 | 58.11 (10) | 54.53 (11) | 59.29 (11) |
O2v—Cr—O3vii | 129.86 (10) | 126.96 (9) | 132.32 (9) |
O2v—Cr—O3i | 62.41 (10) | 61.23 (11) | 64.44 (10) |
O2v—Cr—O3v | 49.81 (14) | 46.33 (14) | 51.37 (13) |
O2v—Cr—O3xi | 146.34 (8) | 143.02 (7) | 152.74 (8) |
O2v—Cr—O3xii | 77.28 (15) | 74.45 (14) | 78.11 (13) |
O3ix—Cr—O3 | 94.28 (10) | 89.54 (10) | 104.58 (10) |
O3ix—Cr—O3vii | 84.08 (10) | 74.64 (8) | 87.69 (9) |
O3ix—Cr—O3i | 165.27 (14) | 163.46 (13) | 166.6 (2) |
O3ix—Cr—O3x | 126.88 (12) | 118.97 (11) | 131.44 (12) |
O3ix—Cr—O3v | 80.31 (15) | 78.51 (15) | 84.17 (14) |
O3ix—Cr—O3xi | 38.15 (10) | 34.72 (11) | 44.63 (11) |
O3ix—Cr—O3xii | 110.03 (15) | 106.47 (15) | 112.06 (14) |
O3—Cr—O3vii | 167.09 (11) | 165.38 (10) | 168.06 (11) |
O3—Cr—O3i | 83.97 (10) | 74.64 (9) | 87.65 (9) |
O3—Cr—O3x | 82.62 (8) | 75.70 (8) | 85.66 (8) |
O3—Cr—O3v | 55.04 (12) | 53.74 (12) | 57.13 (12) |
O3—Cr—O3xi | 88.75 (8) | 85.89 (8) | 96.93 (9) |
O3—Cr—O3xii | 135.67 (14) | 131.47 (14) | 137.26 (13) |
O3vii—Cr—O3i | 94.16 (10) | 89.54 (10) | 104.58 (10) |
O3vii—Cr—O3x | 88.67 (8) | 85.89 (8) | 96.93 (9) |
O3vii—Cr—O3v | 135.74 (14) | 131.46 (14) | 137.26 (13) |
O3vii—Cr—O3xi | 82.69 (8) | 75.70 (8) | 85.66 (8) |
O3vii—Cr—O3xii | 55.01 (12) | 53.75 (12) | 57.13 (12) |
O3i—Cr—O3x | 38.09 (10) | 34.72 (11) | 44.63 (11) |
O3i—Cr—O3v | 110.09 (15) | 106.47 (15) | 112.06 (14) |
O3i—Cr—O3xi | 126.82 (12) | 118.96 (11) | 131.44 (12) |
O3i—Cr—O3xii | 80.37 (15) | 78.51 (15) | 84.17 (14) |
O3x—Cr—O3v | 132.66 (13) | 131.06 (13) | 133.86 (13) |
O3x—Cr—O3xi | 89.35 (9) | 79.09 (10) | 92.93 (8) |
O3x—Cr—O3xii | 108.13 (13) | 104.20 (13) | 112.79 (13) |
O3v—Cr—O3xi | 108.11 (13) | 104.20 (13) | 112.79 (13) |
O3v—Cr—O3xii | 92.52 (16) | 91.21 (16) | 94.79 (16) |
O3xi—Cr—O3xii | 132.66 (13) | 131.04 (13) | 133.86 (13) |
Symmetry codes: (i) −x1+1, x2, −x3+1, −x4+1/2; (ii) −x1+2, x2, −x3+2, −x4+1/2; (iii) −x1+3/2, x2+1/2, −x3+1, −x4+1/2; (iv) −x1+2, −x2, −x3+1, −x4; (v) −x1+3/2, −x2−1/2, −x3+1, −x4; (vi) x1, −x2, x3, x4+1/2; (vii) −x1+1, x2, −x3, −x4+1/2; (viii) −x1+3/2, −x2−1/2, −x3, −x4; (ix) x1, x2, x3−1, x4; (x) −x1+1, −x2, −x3+1, −x4; (xi) x1, −x2, x3−1, x4+1/2; (xii) x1−1/2, −x2−1/2, x3−1, x4+1/2. |
(B) top
Crystal data top
Cr2O7P2 | V = 258.71 Å3 |
Mr = 277.9 | Z = 2 |
Monoclinic, C2/m(α0γ)0s† | F(000) = 268.0 |
q = -0.36100a* + 0.47100c* | Dx = 3.567 Mg m−3 |
a = 7.0192 Å | Mo Kα radiation, λ = 0.71069 Å |
b = 8.4063 Å | µ = 4.80 mm−1 |
c = 4.6264 Å | T = 293 K |
β = 108.6111° |
† Symmetry operations: (1) x1, x2, x3, x4; (2) −x1, x2, −x3, −x4+1/2; (3) −x1, −x2, −x3, −x4; (4) x1, −x2, x3, x4+1/2; (5) x1+1/2, x2+1/2, x3, x4; (6) −x1+1/2, x2+1/2, −x3, −x4+1/2; (7) −x1+1/2, −x2+1/2, −x3, −x4; (8) x1+1/2, −x2+1/2, x3, x4+1/2. |
Data collection top
Radiation source: X-ray tube | Tmin = 0.435, Tmax = 0.677 |
Absorption correction: gaussian CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.27p5 beta Analytical numeric absorption correction using a multifaceted crystal model. |
Refinement top
Δρmax = 0.53 e Å−3 | Extinction correction: B-C type 1 Gaussian isotropic (Becker & Coppens, 1974) |
Δρmin = −0.48 e Å−3 | Extinction coefficient: 594.45 |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
x | y | z | Uiso*/Ueq | Occ. (<1) | |
P | 0.802777 | −0.019373 | 0.583385 | 0.0059 | 0.416 |
P(a) | 0.78983 | −0.015268 | 0.57442 | 0.0073 | 0.042 |
P(b) | 0.819682 | 0.005666 | 0.588919 | 0.0033 | 0.042 |
O1 | 0.637449 | 0 | 0.277283 | 0.0087 | |
O2 | 1 | −0.064282 | 0.5 | 0.0176 | 0.416 |
O2(a) | 1.000445 | −0.054036 | 0.530873 | 0.0264 | 0.042 |
O3 | 0.806158 | −0.146553 | 0.758822 | 0.0129 | |
O3(a) | 0.842688 | −0.147832 | 0.731592 | 0.0294 | 0.042 |
O3(b) | 0.761605 | −0.149954 | 0.771546 | 0.0012 | 0.042 |
Cr | 0.5 | −0.187867 | 0 | 0.0077 | |
Cr(a) | 0.474309 | −0.189819 | 0.018535 | 0.0113 | 0.0418 |
Atomic displacement parameters (Å2) top
U11 | U22 | U33 | U12 | U13 | U23 | |
P | 0.005593 | 0.005891 | 0.004706 | −0.00034 | −0.000391 | 0.000052 |
P(a) | −0.000148 | 0.007406 | 0.01524 | −0.006225 | 0.003177 | −0.013938 |
P(b) | −0.007628 | 0.002302 | 0.008033 | −0.004147 | −0.009847 | −0.002724 |
O1 | 0.009786 | 0.006013 | 0.008194 | 0 | −0.000218 | 0 |
O2 | 0.008582 | 0.023118 | 0.023054 | 0 | 0.007945 | 0 |
O2(a) | 0.009804 | 0.054417 | 0.021878 | −0.000069 | 0.014969 | −0.010542 |
O3 | 0.01492 | 0.009897 | 0.011161 | 0.002627 | 0.000389 | 0.002558 |
O3(a) | 0.03646 | 0.011932 | 0.019891 | 0.01184 | −0.019054 | −0.00522 |
O3(b) | −0.002903 | 0.003676 | 0.000273 | 0.004606 | −0.004163 | −0.002141 |
Cr | 0.008253 | 0.00475 | 0.0072 | 0 | −0.001756 | 0 |
Cr(a) | 0.01418 | 0.003552 | 0.012183 | −0.001728 | −0.001452 | 0.000734 |
Geometric parameters (Å, º) top
Average | Minimum | Maximum | |
P—O1 | 1.53 (8) | 1.49 (9) | 1.55 (9) |
P—O1i | 3.39 (10) | 3.25 (10) | 3.46 (11) |
P—O2 | 1.60 (10) | 1.58 (10) | 1.60 (13) |
P—O3 | 1.51 (12) | 1.44 (9) | 1.55 (14) |
P—O3ii | 3.49 (9) | 3.46 (10) | 3.57 (7) |
P—O3iii | 3.47 (13) | 3.43 (16) | 3.55 (14) |
P—O3iv | 3.54 (11) | 3.45 (12) | 3.75 (8) |
P—O3v | 3.24 (13) | 3.15 (14) | 3.28 (16) |
P—O3vi | 1.49 (13) | 1.45 (16) | 1.61 (14) |
Cr—O1 | 2.079 (2) | 2.046 (2) | 2.104 (3) |
Cr—O1vii | 2.080 (2) | 2.046 (2) | 2.104 (3) |
Cr—O2viii | 3.194 (6) | 3.091 (5) | 3.403 (5) |
Cr—O2v | 3.191 (6) | 3.091 (5) | 3.402 (5) |
Cr—O3ix | 2.708 (4) | 2.378 (5) | 3.431 (5) |
Cr—O3 | 3.512 (3) | 3.490 (3) | 3.536 (3) |
Cr—O3vii | 3.511 (3) | 3.490 (3) | 3.536 (3) |
Cr—O3i | 2.716 (4) | 2.378 (5) | 3.431 (5) |
Cr—O3x | 3.950 (4) | 3.594 (4) | 4.086 (4) |
Cr—O3v | 2.024 (4) | 1.984 (4) | 2.048 (4) |
Cr—O3xi | 3.947 (4) | 3.594 (4) | 4.086 (4) |
Cr—O3xii | 2.023 (4) | 1.984 (4) | 2.048 (4) |
O1—P—O1i | 72 (3) | 68 (4) | 76 (4) |
O1—P—O2 | 105 (7) | 102 (5) | 111 (7) |
O1—P—O3 | 112 (6) | 109 (7) | 117 (7) |
O1—P—O3ii | 165 (7) | 163 (8) | 169 (8) |
O1—P—O3iii | 62 (4) | 59 (5) | 64 (5) |
O1—P—O3iv | 92 (5) | 87 (5) | 96 (5) |
O1—P—O3v | 66 (4) | 64 (5) | 71 (5) |
O1—P—O3vi | 111 (7) | 108 (8) | 113 (9) |
O1i—P—O2 | 165 (7) | 162 (8) | 172 (6) |
O1i—P—O3 | 66 (3) | 65 (3) | 69 (3) |
O1i—P—O3ii | 107 (3) | 106 (3) | 109 (2) |
O1i—P—O3iii | 89 (3) | 86 (3) | 92.7 (19) |
O1i—P—O3iv | 151 (4) | 149 (4) | 154 (4) |
O1i—P—O3v | 89 (2) | 83 (3) | 102 (3) |
O1i—P—O3vi | 83 (4) | 76 (4) | 87 (6) |
O2—P—O3 | 103 (7) | 101 (7) | 109 (5) |
O2—P—O3ii | 73 (3) | 66 (3) | 78 (2) |
O2—P—O3iii | 102 (5) | 91 (4) | 105 (6) |
O2—P—O3iv | 40 (3) | 31 (2) | 43 (3) |
O2—P—O3v | 77 (5) | 69 (5) | 82 (4) |
O2—P—O3vi | 111 (6) | 105 (6) | 114 (7) |
O3—P—O3ii | 56 (3) | 53.5 (19) | 57 (3) |
O3—P—O3iii | 155 (6) | 153 (5) | 160 (5) |
O3—P—O3iv | 142 (5) | 137 (4) | 145 (5) |
O3—P—O3v | 63 (4) | 60 (5) | 68 (5) |
O3—P—O3vi | 114 (7) | 112 (7) | 115 (9) |
O3ii—P—O3iii | 133 (3) | 129 (2) | 135 (4) |
O3ii—P—O3iv | 95.3 (19) | 90.7 (13) | 98 (2) |
O3ii—P—O3v | 99 (3) | 98 (4) | 101 (3) |
O3ii—P—O3vi | 83 (3) | 82 (2) | 84 (4) |
O3iii—P—O3iv | 62 (2) | 60.9 (15) | 64 (2) |
O3iii—P—O3v | 126 (3) | 123 (3) | 127 (2) |
O3iii—P—O3vi | 54 (4) | 53 (3) | 56 (4) |
O3iv—P—O3v | 105 (3) | 95 (3) | 110 (3) |
O3iv—P—O3vi | 82 (4) | 79 (4) | 87 (5) |
O3v—P—O3vi | 172 (5) | 170 (4) | 178 (5) |
O1—Cr—O1vii | 79.93 (9) | 78.94 (8) | 81.69 (9) |
O1—Cr—O2viii | 141.29 (11) | 138.76 (12) | 147.96 (10) |
O1—Cr—O2v | 96.20 (15) | 94.13 (16) | 100.24 (15) |
O1—Cr—O3ix | 83.86 (11) | 76.41 (9) | 89.29 (11) |
O1—Cr—O3 | 44.72 (7) | 44.03 (7) | 45.31 (8) |
O1—Cr—O3vii | 123.75 (10) | 122.05 (10) | 125.28 (10) |
O1—Cr—O3i | 85.76 (10) | 79.26 (9) | 90.99 (11) |
O1—Cr—O3x | 57.48 (8) | 52.09 (8) | 64.05 (8) |
O1—Cr—O3v | 95.19 (11) | 92.79 (11) | 97.00 (11) |
O1—Cr—O3xi | 55.71 (8) | 50.67 (8) | 62.33 (8) |
O1—Cr—O3xii | 165.17 (15) | 160.22 (15) | 169.24 (15) |
O1vii—Cr—O2viii | 96.10 (15) | 94.13 (16) | 100.21 (15) |
O1vii—Cr—O2v | 141.23 (11) | 138.76 (12) | 147.91 (10) |
O1vii—Cr—O3ix | 85.89 (11) | 79.26 (9) | 90.99 (11) |
O1vii—Cr—O3 | 123.71 (10) | 122.05 (10) | 125.27 (10) |
O1vii—Cr—O3vii | 44.72 (7) | 44.03 (7) | 45.31 (8) |
O1vii—Cr—O3i | 83.72 (11) | 76.40 (9) | 89.30 (11) |
O1vii—Cr—O3x | 55.63 (8) | 50.67 (8) | 62.33 (8) |
O1vii—Cr—O3v | 165.23 (15) | 160.22 (15) | 169.26 (15) |
O1vii—Cr—O3xi | 57.55 (8) | 52.09 (8) | 64.05 (8) |
O1vii—Cr—O3xii | 95.19 (11) | 92.78 (11) | 97.00 (11) |
O2viii—Cr—O3ix | 62.31 (11) | 61.19 (11) | 64.37 (10) |
O2viii—Cr—O3 | 129.93 (10) | 126.78 (10) | 132.36 (10) |
O2viii—Cr—O3vii | 58.12 (10) | 54.51 (11) | 59.30 (12) |
O2viii—Cr—O3i | 128.60 (11) | 125.17 (12) | 130.25 (11) |
O2viii—Cr—O3x | 146.18 (8) | 143.07 (7) | 152.92 (8) |
O2viii—Cr—O3v | 77.37 (15) | 74.37 (14) | 78.09 (13) |
O2viii—Cr—O3xii | 49.81 (14) | 46.25 (14) | 51.51 (14) |
O2v—Cr—O3ix | 128.63 (11) | 125.18 (12) | 130.25 (11) |
O2v—Cr—O3 | 58.10 (10) | 54.53 (11) | 59.30 (12) |
O2v—Cr—O3vii | 129.84 (10) | 126.77 (10) | 132.36 (10) |
O2v—Cr—O3i | 62.36 (11) | 61.19 (11) | 64.40 (10) |
O2v—Cr—O3v | 49.84 (14) | 46.28 (14) | 51.51 (14) |
O2v—Cr—O3xi | 146.38 (8) | 143.07 (7) | 152.93 (8) |
O2v—Cr—O3xii | 77.30 (15) | 74.33 (14) | 78.09 (13) |
O3ix—Cr—O3 | 94.31 (10) | 89.55 (10) | 104.58 (10) |
O3ix—Cr—O3vii | 84.07 (10) | 74.65 (9) | 87.60 (9) |
O3ix—Cr—O3i | 165.31 (14) | 163.83 (13) | 166.7 (2) |
O3ix—Cr—O3x | 126.90 (12) | 119.20 (11) | 131.39 (12) |
O3ix—Cr—O3v | 80.29 (15) | 78.50 (15) | 84.21 (14) |
O3ix—Cr—O3xi | 38.19 (10) | 34.72 (11) | 44.69 (11) |
O3ix—Cr—O3xii | 110.01 (15) | 106.51 (16) | 112.05 (14) |
O3—Cr—O3vii | 167.14 (11) | 165.30 (11) | 168.12 (11) |
O3—Cr—O3i | 83.96 (10) | 74.65 (9) | 87.56 (9) |
O3—Cr—O3x | 82.63 (8) | 75.90 (8) | 85.68 (8) |
O3—Cr—O3v | 54.98 (12) | 53.86 (12) | 57.06 (13) |
O3—Cr—O3xi | 88.78 (9) | 85.90 (8) | 97.09 (9) |
O3—Cr—O3xii | 135.68 (14) | 131.49 (14) | 137.26 (14) |
O3vii—Cr—O3i | 94.18 (10) | 89.55 (11) | 104.58 (10) |
O3vii—Cr—O3x | 88.70 (9) | 85.90 (8) | 97.09 (9) |
O3vii—Cr—O3v | 135.75 (14) | 131.49 (14) | 137.26 (14) |
O3vii—Cr—O3xi | 82.69 (8) | 75.90 (8) | 85.68 (8) |
O3vii—Cr—O3xii | 54.96 (12) | 53.86 (12) | 57.06 (13) |
O3i—Cr—O3x | 38.13 (10) | 34.72 (11) | 44.69 (11) |
O3i—Cr—O3v | 110.07 (15) | 106.51 (16) | 112.05 (14) |
O3i—Cr—O3xi | 126.85 (12) | 119.20 (11) | 131.39 (12) |
O3i—Cr—O3xii | 80.35 (15) | 78.50 (15) | 84.21 (14) |
O3x—Cr—O3v | 132.63 (13) | 130.95 (13) | 133.78 (13) |
O3x—Cr—O3xi | 89.34 (9) | 79.19 (10) | 92.86 (8) |
O3x—Cr—O3xii | 108.13 (13) | 104.14 (13) | 112.88 (13) |
O3v—Cr—O3xi | 108.11 (13) | 104.14 (13) | 112.88 (14) |
O3v—Cr—O3xii | 92.59 (16) | 91.41 (16) | 94.80 (16) |
O3xi—Cr—O3xii | 132.62 (13) | 130.96 (13) | 133.78 (13) |
Symmetry codes: (i) −x1+1, x2, −x3+1, −x4+1/2; (ii) −x1+2, x2, −x3+2, −x4+1/2; (iii) −x1+3/2, x2+1/2, −x3+1, −x4+1/2; (iv) −x1+2, −x2, −x3+1, −x4; (v) −x1+3/2, −x2−1/2, −x3+1, −x4; (vi) x1, −x2, x3, x4+1/2; (vii) −x1+1, x2, −x3, −x4+1/2; (viii) −x1+3/2, −x2−1/2, −x3, −x4; (ix) x1, x2, x3−1, x4; (x) −x1+1, −x2, −x3+1, −x4; (xi) x1, −x2, x3−1, x4+1/2; (xii) x1−1/2, −x2−1/2, x3−1, x4+1/2. |
(M) top
Crystal data top
Cr2O7P2 | V = 258.71 Å3 |
Mr = 277.9 | Z = 2 |
Monoclinic, C2/m(α0γ)1s† | F(000) = 268 |
q = -0.36100a* + 0.47100c* | Dx = 3.567 Mg m−3 |
a = 7.0192 Å | Mo Kα radiation, λ = 0.71069 Å |
b = 8.4063 Å | µ = 4.80 mm−1 |
c = 4.6264 Å | T = 293 K |
β = 108.6111° |
† Symmetry operations: (1) x1, x2, x3, x4; (2) −x1, x2, −x3, −x4+1/2; (3) −x1, −x2, −x3, −x4; (4) x1, −x2, x3, x4+1/2; (5) x1+1/2, x2+1/2, x3, x4; (6) −x1+1/2, x2+1/2, −x3, −x4+1/2; (7) −x1+1/2, −x2+1/2, −x3, −x4; (8) x1+1/2, −x2+1/2, x3, x4+1/2. |
Data collection top
Radiation source: X-ray tube | 2409 independent reflections |
Absorption correction: gaussian CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.27p5 beta Analytical numeric absorption correction using a multifaceted crystal model. | 1433 reflections with I > 3σ(I) |
Tmin = 0.435, Tmax = 0.677 |
Refinement top
Refinement on F | 46 constraints |
R[F2 > 2σ(F2)] = 0.022 | Weighting scheme based on measured s.u.'s w = 1/(σ2(F) + 0.0004F2) |
wR(F2) = 0.057 | (Δ/σ)max = 0.0003 |
S = 1.58 | Δρmax = 0.48 e Å−3 |
2409 reflections | Δρmin = −0.47 e Å−3 |
170 parameters | Extinction correction: B-C type 1 Gaussian isotropic (Becker & Coppens, 1974) |
0 restraints | Extinction coefficient: 620 (100) |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
x | y | z | Uiso*/Ueq | Occ. (<1) | |
P | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.00636 (19) | 0.4157 (14) |
P(a) | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.0165 (17) | 0.0421 (7) |
P(b) | 0.80672 (9) | −0.01175 (12) | 0.58376 (17) | 0.0114 (16) | 0.0421 (7) |
O1 | 0.63754 (19) | 0 | 0.2775 (3) | 0.0089 (4) | |
O2 | 1 | −0.0644 (3) | 0.5 | 0.0179 (6) | 0.4157 (14) |
O2(a) | 1.0014 (13) | −0.0545 (9) | 0.532 (2) | 0.027 (3) | 0.0421 (7) |
O3 | 0.80628 (16) | −0.14636 (13) | 0.7591 (3) | 0.0130 (3) | |
O3(a) | 0.8438 (15) | −0.1466 (13) | 0.729 (2) | 0.030 (4) | 0.0421 (7) |
O3(b) | 0.7622 (11) | −0.1517 (11) | 0.772 (2) | 0.001 (2) | 0.0421 (7) |
Cr | 0.5 | −0.18798 (6) | 0 | 0.00790 (15) | |
Cr(a) | 0.4749 (11) | −0.1898 (3) | 0.019 (2) | 0.0113 (14) | 0.0423 (8) |
Atomic displacement parameters (Å2) top
U11 | U22 | U33 | U12 | U13 | U23 | |
P | 0.0053 (3) | 0.0074 (3) | 0.0052 (3) | −0.00064 (18) | 0 | −0.0012 (3) |
P(a) | 0.003 (2) | 0.027 (3) | 0.017 (3) | 0.009 (2) | 0.000 (2) | 0.010 (3) |
P(b) | 0.013 (2) | 0.010 (2) | 0.006 (3) | −0.005 (2) | −0.004 (2) | 0.021 (3) |
O1 | 0.0096 (7) | 0.0069 (6) | 0.0083 (7) | 0 | 0.0000 (5) | 0 |
O2 | 0.0090 (9) | 0.0233 (11) | 0.0236 (10) | 0 | 0.0081 (7) | 0 |
O2(a) | 0.011 (3) | 0.054 (6) | 0.021 (4) | −0.004 (5) | 0.015 (3) | −0.013 (5) |
O3 | 0.0152 (6) | 0.0099 (5) | 0.0110 (5) | 0.0027 (4) | 0.0002 (4) | 0.0026 (4) |
O3(a) | 0.036 (7) | 0.021 (5) | 0.016 (5) | 0.009 (5) | −0.016 (5) | −0.005 (4) |
O3(b) | −0.002 (4) | 0.001 (3) | 0.002 (3) | 0.004 (3) | −0.003 (3) | 0.000 (2) |
Cr | 0.0083 (2) | 0.0051 (2) | 0.0073 (2) | 0 | −0.00179 (14) | 0 |
Cr(a) | 0.016 (3) | 0.0040 (7) | 0.010 (2) | −0.0014 (8) | −0.0012 (16) | 0.0006 (9) |
Geometric parameters (Å, º) top
Average | Minimum | Maximum | |
P—O1 | 1.5348 (16) | 1.5213 (16) | 1.5423 (16) |
P—O1i | 3.389 (2) | 3.288 (2) | 3.449 (2) |
P—O2 | 1.597 (3) | 1.553 (3) | 1.640 (3) |
P—O3 | 1.516 (4) | 1.495 (4) | 1.537 (4) |
P—O3ii | 3.491 (3) | 3.466 (3) | 3.582 (3) |
P—O3iii | 3.468 (4) | 3.378 (4) | 3.498 (4) |
P—O3iv | 3.542 (4) | 3.454 (4) | 3.737 (4) |
P—O3v | 3.253 (4) | 3.202 (4) | 3.320 (4) |
P—O3vi | 1.484 (4) | 1.461 (4) | 1.500 (4) |
Cr—O1 | 2.080 (2) | 2.051 (2) | 2.106 (3) |
Cr—O1vii | 2.080 (2) | 2.051 (2) | 2.106 (3) |
Cr—O2viii | 3.193 (6) | 3.093 (5) | 3.396 (5) |
Cr—O2v | 3.190 (6) | 3.093 (5) | 3.395 (5) |
Cr—O3ix | 2.708 (4) | 2.380 (5) | 3.428 (4) |
Cr—O3 | 3.513 (3) | 3.489 (3) | 3.544 (3) |
Cr—O3vii | 3.513 (3) | 3.489 (3) | 3.544 (3) |
Cr—O3i | 2.716 (4) | 2.380 (5) | 3.428 (4) |
Cr—O3x | 3.950 (4) | 3.594 (4) | 4.084 (4) |
Cr—O3v | 2.024 (4) | 1.974 (4) | 2.049 (4) |
Cr—O3xi | 3.946 (4) | 3.594 (4) | 4.084 (4) |
Cr—O3xii | 2.024 (4) | 1.974 (4) | 2.049 (4) |
O1—P—O1i | 71.57 (8) | 68.12 (8) | 75.16 (8) |
O1—P—O2 | 105.03 (9) | 99.57 (9) | 109.88 (9) |
O1—P—O3 | 111.24 (14) | 110.09 (14) | 112.45 (14) |
O1—P—O3ii | 164.43 (9) | 162.73 (9) | 165.49 (9) |
O1—P—O3iii | 62.67 (8) | 61.34 (8) | 64.99 (8) |
O1—P—O3iv | 91.80 (9) | 87.35 (9) | 96.30 (9) |
O1—P—O3v | 65.47 (8) | 64.72 (8) | 66.62 (8) |
O1—P—O3vi | 111.48 (14) | 110.74 (14) | 114.29 (15) |
O1i—P—O2 | 164.8 (4) | 162.5 (4) | 168.2 (4) |
O1i—P—O3 | 66.44 (15) | 65.34 (15) | 69.78 (15) |
O1i—P—O3ii | 106.69 (8) | 105.73 (8) | 109.00 (8) |
O1i—P—O3iii | 89.39 (7) | 86.62 (7) | 94.32 (8) |
O1i—P—O3iv | 151.59 (7) | 149.68 (7) | 155.83 (6) |
O1i—P—O3v | 89.02 (8) | 83.42 (8) | 99.29 (8) |
O1i—P—O3vi | 82.65 (16) | 75.25 (16) | 86.72 (16) |
O2—P—O3 | 103.1 (3) | 101.0 (3) | 105.4 (3) |
O2—P—O3ii | 72.64 (11) | 66.69 (13) | 76.97 (12) |
O2—P—O3iii | 101.8 (3) | 92.8 (2) | 105.1 (2) |
O2—P—O3iv | 40.4 (3) | 33.3 (2) | 43.0 (3) |
O2—P—O3v | 76.7 (3) | 69.9 (3) | 79.6 (2) |
O2—P—O3vi | 111.4 (3) | 110.6 (3) | 112.3 (3) |
O3—P—O3ii | 55.86 (14) | 53.58 (14) | 57.14 (13) |
O3—P—O3iii | 155.15 (17) | 153.07 (17) | 163.10 (18) |
O3—P—O3iv | 141.93 (16) | 134.39 (16) | 144.76 (16) |
O3—P—O3v | 62.35 (15) | 59.62 (15) | 66.57 (15) |
O3—P—O3vi | 113.9 (2) | 112.7 (2) | 114.9 (2) |
O3ii—P—O3iii | 132.76 (8) | 131.53 (8) | 134.81 (8) |
O3ii—P—O3iv | 95.31 (9) | 90.64 (9) | 97.58 (9) |
O3ii—P—O3v | 99.13 (9) | 97.24 (9) | 100.82 (8) |
O3ii—P—O3vi | 83.19 (14) | 82.48 (14) | 84.97 (14) |
O3iii—P—O3iv | 62.28 (9) | 61.62 (9) | 64.90 (9) |
O3iii—P—O3v | 125.58 (8) | 123.40 (9) | 127.01 (8) |
O3iii—P—O3vi | 54.57 (15) | 53.44 (15) | 57.01 (15) |
O3iv—P—O3v | 104.97 (10) | 94.92 (10) | 110.22 (10) |
O3iv—P—O3vi | 82.33 (18) | 78.74 (18) | 90.17 (17) |
O3v—P—O3vi | 171.90 (17) | 169.49 (17) | 177.47 (15) |
O1—Cr—O1vii | 79.97 (9) | 78.90 (8) | 81.47 (8) |
O1—Cr—O2viii | 141.29 (11) | 138.84 (11) | 147.92 (10) |
O1—Cr—O2v | 96.17 (15) | 94.16 (16) | 100.07 (14) |
O1—Cr—O3ix | 83.84 (10) | 76.20 (9) | 89.27 (11) |
O1—Cr—O3 | 44.68 (7) | 44.04 (7) | 45.23 (7) |
O1—Cr—O3vii | 123.74 (10) | 121.91 (10) | 125.22 (9) |
O1—Cr—O3i | 85.74 (10) | 79.31 (9) | 90.95 (11) |
O1—Cr—O3x | 57.50 (8) | 52.16 (7) | 63.98 (8) |
O1—Cr—O3v | 95.21 (11) | 92.83 (11) | 97.03 (11) |
O1—Cr—O3xi | 55.71 (8) | 50.61 (8) | 62.25 (8) |
O1—Cr—O3xii | 165.18 (14) | 160.25 (15) | 169.28 (14) |
O1vii—Cr—O2viii | 96.08 (15) | 94.16 (16) | 100.04 (15) |
O1vii—Cr—O2v | 141.23 (11) | 138.84 (11) | 147.88 (10) |
O1vii—Cr—O3ix | 85.88 (10) | 79.31 (9) | 90.95 (11) |
O1vii—Cr—O3 | 123.70 (10) | 121.91 (10) | 125.22 (9) |
O1vii—Cr—O3vii | 44.68 (7) | 44.04 (7) | 45.23 (7) |
O1vii—Cr—O3i | 83.70 (10) | 76.19 (9) | 89.27 (11) |
O1vii—Cr—O3x | 55.62 (8) | 50.61 (8) | 62.25 (8) |
O1vii—Cr—O3v | 165.25 (14) | 160.25 (15) | 169.29 (14) |
O1vii—Cr—O3xi | 57.58 (8) | 52.16 (7) | 63.98 (8) |
O1vii—Cr—O3xii | 95.21 (11) | 92.82 (11) | 97.03 (11) |
O2viii—Cr—O3ix | 62.36 (10) | 61.23 (11) | 64.41 (10) |
O2viii—Cr—O3 | 129.94 (10) | 126.96 (9) | 132.32 (9) |
O2viii—Cr—O3vii | 58.14 (10) | 54.51 (11) | 59.29 (11) |
O2viii—Cr—O3i | 128.61 (11) | 125.32 (12) | 130.22 (11) |
O2viii—Cr—O3x | 146.14 (8) | 143.02 (6) | 152.73 (8) |
O2viii—Cr—O3v | 77.34 (15) | 74.49 (14) | 78.11 (13) |
O2viii—Cr—O3xii | 49.78 (14) | 46.30 (14) | 51.37 (13) |
O2v—Cr—O3ix | 128.64 (11) | 125.34 (12) | 130.22 (11) |
O2v—Cr—O3 | 58.11 (10) | 54.53 (11) | 59.29 (11) |
O2v—Cr—O3vii | 129.86 (10) | 126.96 (9) | 132.32 (9) |
O2v—Cr—O3i | 62.41 (10) | 61.23 (11) | 64.44 (10) |
O2v—Cr—O3v | 49.81 (14) | 46.33 (14) | 51.37 (13) |
O2v—Cr—O3xi | 146.34 (8) | 143.02 (7) | 152.74 (8) |
O2v—Cr—O3xii | 77.28 (15) | 74.45 (14) | 78.11 (13) |
O3ix—Cr—O3 | 94.28 (10) | 89.54 (10) | 104.58 (10) |
O3ix—Cr—O3vii | 84.08 (10) | 74.64 (8) | 87.69 (9) |
O3ix—Cr—O3i | 165.27 (14) | 163.46 (13) | 166.6 (2) |
O3ix—Cr—O3x | 126.88 (12) | 118.97 (11) | 131.44 (12) |
O3ix—Cr—O3v | 80.31 (15) | 78.51 (15) | 84.17 (14) |
O3ix—Cr—O3xi | 38.15 (10) | 34.72 (11) | 44.63 (11) |
O3ix—Cr—O3xii | 110.03 (15) | 106.47 (15) | 112.06 (14) |
O3—Cr—O3vii | 167.09 (11) | 165.38 (10) | 168.06 (11) |
O3—Cr—O3i | 83.97 (10) | 74.64 (9) | 87.65 (9) |
O3—Cr—O3x | 82.62 (8) | 75.70 (8) | 85.66 (8) |
O3—Cr—O3v | 55.04 (12) | 53.74 (12) | 57.13 (12) |
O3—Cr—O3xi | 88.75 (8) | 85.89 (8) | 96.93 (9) |
O3—Cr—O3xii | 135.67 (14) | 131.47 (14) | 137.26 (13) |
O3vii—Cr—O3i | 94.16 (10) | 89.54 (10) | 104.58 (10) |
O3vii—Cr—O3x | 88.67 (8) | 85.89 (8) | 96.93 (9) |
O3vii—Cr—O3v | 135.74 (14) | 131.46 (14) | 137.26 (13) |
O3vii—Cr—O3xi | 82.69 (8) | 75.70 (8) | 85.66 (8) |
O3vii—Cr—O3xii | 55.01 (12) | 53.75 (12) | 57.13 (12) |
O3i—Cr—O3x | 38.09 (10) | 34.72 (11) | 44.63 (11) |
O3i—Cr—O3v | 110.09 (15) | 106.47 (15) | 112.06 (14) |
O3i—Cr—O3xi | 126.82 (12) | 118.96 (11) | 131.44 (12) |
O3i—Cr—O3xii | 80.37 (15) | 78.51 (15) | 84.17 (14) |
O3x—Cr—O3v | 132.66 (13) | 131.06 (13) | 133.86 (13) |
O3x—Cr—O3xi | 89.35 (9) | 79.09 (10) | 92.93 (8) |
O3x—Cr—O3xii | 108.13 (13) | 104.20 (13) | 112.79 (13) |
O3v—Cr—O3xi | 108.11 (13) | 104.20 (13) | 112.79 (13) |
O3v—Cr—O3xii | 92.52 (16) | 91.21 (16) | 94.79 (16) |
O3xi—Cr—O3xii | 132.66 (13) | 131.04 (13) | 133.86 (13) |
Symmetry codes: (i) −x1+1, x2, −x3+1, −x4+1/2; (ii) −x1+2, x2, −x3+2, −x4+1/2; (iii) −x1+3/2, x2+1/2, −x3+1, −x4+1/2; (iv) −x1+2, −x2, −x3+1, −x4; (v) −x1+3/2, −x2−1/2, −x3+1, −x4; (vi) x1, −x2, x3, x4+1/2; (vii) −x1+1, x2, −x3, −x4+1/2; (viii) −x1+3/2, −x2−1/2, −x3, −x4; (ix) x1, x2, x3−1, x4; (x) −x1+1, −x2, −x3+1, −x4; (xi) x1, −x2, x3−1, x4+1/2; (xii) x1−1/2, −x2−1/2, x3−1, x4+1/2. |