inorganic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

NaFe(TeO3)2

aInstitute for Chemical Technologies and Analytics, Division of Structural Chemistry, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria
*Correspondence e-mail: mweil@mail.zserv.tuwien.ac.at

(Received 29 November 2007; accepted 4 December 2007; online 6 December 2007)

The hydro­thermally prepared title compound, sodium iron(III) bis­[trioxotellurate(IV)], is isotypic with its GaIII analogue and consists of corrugated layers with an overall composition of [FeTe2O6] together with Na+ cations. The layers extend parallel to (001) and are made up of [Fe2O10] edge-shared octa­hedral dimers and TeO3 trigonal pyramids sharing vertices. The Na+ cations are located in the cavities of this arrangement and link adjacent [FeTe2O6] layers via distorted [NaO8] polyhedra.

Related literature

For the isotypic structure NaGa(TeO3)2, see: Miletich & Pertlik (1998[Miletich, R. & Pertlik, F. (1998). J. Alloys Compds, 268, 107-111.]). For related structures, see: Weil (2005[Weil, M. (2005). Acta Cryst. C61, i103-i105.], 2007[Weil, M. (2007). Z. Anorg. Allg. Chem. 633, 1217-1222.]); Weil & Stöger (2007[Weil, M. & Stöger, B. (2007). Acta Cryst. E63, i202.]). For a review on the crystal chemistry of tellurate(IV) oxocompounds, see: Dolgikh (1991[Dolgikh, V. A. (1991). Russ. J. Inorg. Chem. (Eng. Transl.), 36, 1117-1129.]).

Experimental

Crystal data
  • NaFe(TeO3)2

  • Mr = 430.04

  • Orthorhombic, P c a b

  • a = 7.8530 (15) Å

  • b = 10.448 (2) Å

  • c = 13.438 (3) Å

  • V = 1102.5 (4) Å3

  • Z = 8

  • Mo Kα radiation

  • μ = 13.15 mm−1

  • T = 293 (2) K

  • 0.08 × 0.02 × 0.01 mm

Data collection
  • Bruker SMART APEX CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2002[Bruker (2002). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.405, Tmax = 0.858

  • 11127 measured reflections

  • 1598 independent reflections

  • 1329 reflections with I > 2σ(I)

  • Rint = 0.053

Refinement
  • R[F2 > 2σ(F2)] = 0.027

  • wR(F2) = 0.061

  • S = 1.03

  • 1598 reflections

  • 91 parameters

  • Δρmax = 1.77 e Å−3

  • Δρmin = −0.96 e Å−3

Table 1
Selected bond lengths (Å)

Na—O5i 2.434 (4)
Na—O6ii 2.436 (4)
Na—O3ii 2.491 (4)
Na—O2iii 2.581 (5)
Na—O2ii 2.755 (5)
Na—O1i 2.758 (4)
Na—O4i 2.788 (4)
Na—O3iii 2.958 (4)
Fe—O3iv 1.942 (4)
Fe—O1v 1.955 (4)
Fe—O5vi 2.036 (3)
Fe—O6 2.037 (4)
Fe—O4vii 2.055 (4)
Fe—O4vi 2.078 (4)
Te1—O1 1.893 (4)
Te1—O3ii 1.901 (4)
Te1—O4 1.901 (4)
Te2—O2viii 1.849 (4)
Te2—O6ix 1.892 (4)
Te2—O5x 1.899 (4)
Symmetry codes: (i) [x+{\script{1\over 2}}, -y+{\script{1\over 2}}, z]; (ii) [-x+1, -y+{\script{1\over 2}}, z+{\script{1\over 2}}]; (iii) [-x+{\script{3\over 2}}, y, z+{\script{1\over 2}}]; (iv) [-x+{\script{1\over 2}}, y+{\script{1\over 2}}, -z]; (v) [-x+{\script{1\over 2}}, y, z-{\script{1\over 2}}]; (vi) [x, y+{\script{1\over 2}}, -z+{\script{1\over 2}}]; (vii) [-x+1, -y+{\script{1\over 2}}, z-{\script{1\over 2}}]; (viii) [-x+{\script{1\over 2}}, y, z+{\script{1\over 2}}]; (ix) [-x+{\script{1\over 2}}, y-{\script{1\over 2}}, -z+1]; (x) [x-{\script{1\over 2}}, -y, -z+{\script{3\over 2}}].

Data collection: SMART (Bruker, 2002[Bruker (2002). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2002[Bruker (2002). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; method used to solve structure: coordinates taken from an isotypic structure; program(s) used to refine structure: SHELXL97 (Sheldrick, 1997[Sheldrick, G. M. (1997). SHELXL97. University of Göttingen, Germany.]); molecular graphics: ATOMS (Dowty, 2006[Dowty, E. (2006). ATOMS for Windows. Version 6.3. Shape Software, Kingsport, Tennessee, USA.]); software used to prepare material for publication: SHELXL97.

Supporting information


Comment top

The present communication is part of our ongoing studies of the phase formation and structures of Te(IV)-containing oxocompounds formed under hydrothermal conditions (e.g. Weil, 2005, 2007; Weil & Stöger, 2007).

The crystal structure of the title compound, (I), is built up of layers with an overall composition [FeTe2O6]- extending parallel to (001). Adjacent layers are linked by Na+ cations that are located in the voids of this arrangement (Fig. 1).

The anionic layers consists of octahedral [FeO6] and trigonal-pyramidal TeO3 units as simple building blocks (Table 1). Two edge-sharing [FeO6] octahedra [mean Fe—O = 2.017 Å] form a centrosymmetric [Fe2O10] dimer which is connected to eight TeO3 units via oxygen-atom corners. The equatorial oxygen atoms of the dimer are linked to six Te1O3 groups whereas the axial oxygen atoms of the dimer are part of two Te2O3 groups capping both Fe atoms at the top and at the bottom (Fig. 2). Each of the free corners of the Te1O3 groups are further linked to adjacent [Fe2O10] dimers thus establishing the layered arrangement. The lone-pair electrons of the tellurium(IV) atoms point towards the free space and are aligned approximately parallel to [001]. The Na+ cations are surrounded by eight oxygen atoms, leading to distorted polyhedra with a mean Na—O of 2.650 Å. The Te—O bond lengths and mean O—Te—O angle of 96.3° are typical values for trigonal-pyramidal TeO3 units (Dolgikh, 1991). The next nearest O sites relative to the Te centres are outside of the first coordination spheres with distances of Te1—O2 = 2.549 (4) Å, Te1—O1[x + 1/2, -y + 1/2, z] = 2.570 (4) Å and Te2—O5 = 2.703 (4) Å.

The crystal structure of NaFe(TeO3)2 is isotypic with the GaIII analogue, NaGa(TeO3)2 (Miletich & Pertlik, 1998), and exhibits similar interatomic distances and angles.

Related literature top

For the isotypic structure NaGa(TeO3)2, see: Miletich & Pertlik (1998). For related structures, see: Weil (2005, 2007); Weil & Stöger (2007). For a review on the crystal chemistry of tellurate(IV) oxocompounds, see: Dolgikh (1991).

Experimental top

All chemicals used were of analytical grade (Merck, p.A.) and employed without further purification: 20 mg (0.5 mmol) NaOH, 53 mg (0.33 mmol) Fe2O3 and 160 mg (1 mmol) TeO2 were placed in a 5-ml Teflon-lined steel autoclave that was filled with 2 ml demineralized water. The autoclave was heated at 493 K for 6 d and then cooled to room temperature within 3 h. The reaction product consisted mainly of a mixture of unreacted Fe2O3 and TeO2. Only few colourless crystals of (I) with unspecific habit were obtained.

Refinement top

For better comparison with the isotypic NaGa(TeO3)2 structure, the refinement was carried out in the non-standard setting Pcab of space group No. 61 (standard setting Pbca). The atomic coordinates of the Ga analogue were taken as starting parameters. The highest remaining peak in the final difference Fourier map is 0.71 Å from Te2 and the deepest hole is 0.79 Å from O4.

Structure description top

The present communication is part of our ongoing studies of the phase formation and structures of Te(IV)-containing oxocompounds formed under hydrothermal conditions (e.g. Weil, 2005, 2007; Weil & Stöger, 2007).

The crystal structure of the title compound, (I), is built up of layers with an overall composition [FeTe2O6]- extending parallel to (001). Adjacent layers are linked by Na+ cations that are located in the voids of this arrangement (Fig. 1).

The anionic layers consists of octahedral [FeO6] and trigonal-pyramidal TeO3 units as simple building blocks (Table 1). Two edge-sharing [FeO6] octahedra [mean Fe—O = 2.017 Å] form a centrosymmetric [Fe2O10] dimer which is connected to eight TeO3 units via oxygen-atom corners. The equatorial oxygen atoms of the dimer are linked to six Te1O3 groups whereas the axial oxygen atoms of the dimer are part of two Te2O3 groups capping both Fe atoms at the top and at the bottom (Fig. 2). Each of the free corners of the Te1O3 groups are further linked to adjacent [Fe2O10] dimers thus establishing the layered arrangement. The lone-pair electrons of the tellurium(IV) atoms point towards the free space and are aligned approximately parallel to [001]. The Na+ cations are surrounded by eight oxygen atoms, leading to distorted polyhedra with a mean Na—O of 2.650 Å. The Te—O bond lengths and mean O—Te—O angle of 96.3° are typical values for trigonal-pyramidal TeO3 units (Dolgikh, 1991). The next nearest O sites relative to the Te centres are outside of the first coordination spheres with distances of Te1—O2 = 2.549 (4) Å, Te1—O1[x + 1/2, -y + 1/2, z] = 2.570 (4) Å and Te2—O5 = 2.703 (4) Å.

The crystal structure of NaFe(TeO3)2 is isotypic with the GaIII analogue, NaGa(TeO3)2 (Miletich & Pertlik, 1998), and exhibits similar interatomic distances and angles.

For the isotypic structure NaGa(TeO3)2, see: Miletich & Pertlik (1998). For related structures, see: Weil (2005, 2007); Weil & Stöger (2007). For a review on the crystal chemistry of tellurate(IV) oxocompounds, see: Dolgikh (1991).

Computing details top

Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: coordinates taken from an isotypic structure; program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ATOMS (Dowty, 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).

Figures top
[Figure 1] Fig. 1. The crystal structure of NaGa(TeO3)2 in projection along [110].
[Figure 2] Fig. 2. The [Fe2O10] dimer with the corner-sharing TeO3 trigonal-pyramids attached. Atoms are drawn as displacement ellipsoids at the 90% probability level. [Symmetry operators: (i) -x + 1, -y + 1, z; (ii) -x + 1/2, y + 1/2, -z + 1; (iii) x + 1/2, -y + 1/2, z - 1; (iv) x - 1/2, -y + 1, -z + 1/2; (v) -x + 1/2, -y + 1/2, z - 1; (vi) -x + 1, -y + 1/2, z - 1/2; (vii) x, y + 1/2, -z + 1/2; (viii) -x + 1.5, y, z - 1/2; (ix) x + 1/2, -y + 1, -z + 1/2.]
sodium iron(III) bis[trioxotellurate(IV)] top
Crystal data top
NaFe(TeO3)2F(000) = 1512
Mr = 430.04Dx = 5.182 Mg m3
Orthorhombic, PcabMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2bc 2acCell parameters from 2569 reflections
a = 7.8530 (15) Åθ = 3.0–30.0°
b = 10.448 (2) ŵ = 13.15 mm1
c = 13.438 (3) ÅT = 293 K
V = 1102.5 (4) Å3Prism, colourless
Z = 80.08 × 0.02 × 0.01 mm
Data collection top
Bruker SMART APEX CCD
diffractometer
1598 independent reflections
Radiation source: fine-focus sealed tube1329 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.053
ω scansθmax = 30.0°, θmin = 3.0°
Absorption correction: multi-scan
(SADABS; Bruker, 2002)
h = 119
Tmin = 0.405, Tmax = 0.858k = 1414
11127 measured reflectionsl = 1818
Refinement top
Refinement on F20 restraints
Least-squares matrix: fullPrimary atom site location: isomorphous structure methods
R[F2 > 2σ(F2)] = 0.027 w = 1/[σ2(Fo2) + (0.0323P)2]
where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.061(Δ/σ)max < 0.001
S = 1.03Δρmax = 1.77 e Å3
1598 reflectionsΔρmin = 0.96 e Å3
91 parameters
Crystal data top
NaFe(TeO3)2V = 1102.5 (4) Å3
Mr = 430.04Z = 8
Orthorhombic, PcabMo Kα radiation
a = 7.8530 (15) ŵ = 13.15 mm1
b = 10.448 (2) ÅT = 293 K
c = 13.438 (3) Å0.08 × 0.02 × 0.01 mm
Data collection top
Bruker SMART APEX CCD
diffractometer
1598 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2002)
1329 reflections with I > 2σ(I)
Tmin = 0.405, Tmax = 0.858Rint = 0.053
11127 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.02791 parameters
wR(F2) = 0.0610 restraints
S = 1.03Δρmax = 1.77 e Å3
1598 reflectionsΔρmin = 0.96 e Å3
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Te10.54652 (4)0.28714 (3)0.42454 (2)0.00780 (9)
Te20.08184 (4)0.00810 (3)0.76667 (2)0.00932 (9)
Fe0.30472 (10)0.49980 (6)0.02064 (5)0.00866 (15)
Na0.8320 (3)0.2417 (2)0.64216 (19)0.0254 (6)
O10.3210 (4)0.3435 (3)0.4480 (3)0.0122 (7)
O20.4293 (5)0.1849 (4)0.2665 (3)0.0169 (8)
O30.3696 (4)0.1292 (3)0.0402 (3)0.0106 (7)
O40.4983 (4)0.1292 (3)0.4888 (3)0.0104 (7)
O50.3769 (5)0.0296 (3)0.6643 (3)0.0107 (7)
O60.2625 (5)0.4796 (3)0.1281 (3)0.0119 (7)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Te10.00751 (16)0.00640 (14)0.00950 (15)0.00033 (11)0.00003 (11)0.00063 (11)
Te20.00962 (16)0.00905 (15)0.00928 (16)0.00021 (11)0.00013 (11)0.00144 (11)
Fe0.0085 (3)0.0069 (3)0.0106 (4)0.0000 (3)0.0002 (3)0.0005 (2)
Na0.0326 (15)0.0142 (11)0.0294 (13)0.0056 (10)0.0082 (11)0.0034 (10)
O10.0065 (17)0.0113 (16)0.0188 (19)0.0005 (14)0.0010 (14)0.0019 (14)
O20.022 (2)0.0110 (17)0.0175 (19)0.0020 (15)0.0020 (16)0.0000 (14)
O30.0087 (17)0.0094 (16)0.0138 (17)0.0030 (14)0.0017 (14)0.0023 (13)
O40.0074 (17)0.0085 (16)0.0152 (17)0.0012 (13)0.0020 (13)0.0028 (13)
O50.0096 (17)0.0156 (17)0.0071 (17)0.0007 (14)0.0014 (13)0.0017 (14)
O60.0119 (18)0.0154 (17)0.0084 (17)0.0003 (14)0.0003 (14)0.0006 (13)
Geometric parameters (Å, º) top
Na—O5i2.434 (4)Fe—O5vi2.036 (3)
Na—O6ii2.436 (4)Fe—O62.037 (4)
Na—O3ii2.491 (4)Fe—O4vii2.055 (4)
Na—O2iii2.581 (5)Fe—O4vi2.078 (4)
Na—O2ii2.755 (5)Te1—O11.893 (4)
Na—O1i2.758 (4)Te1—O3ii1.901 (4)
Na—O4i2.788 (4)Te1—O41.901 (4)
Na—O3iii2.958 (4)Te2—O2viii1.849 (4)
Fe—O3iv1.942 (4)Te2—O6ix1.892 (4)
Fe—O1v1.955 (4)Te2—O5x1.899 (4)
O1—Te1—O3ii92.59 (15)O6ii—Na—O4i123.02 (15)
O1—Te1—O490.44 (15)O3ii—Na—O4i68.23 (12)
O3ii—Te1—O495.54 (16)O2iii—Na—O4i104.45 (14)
O2viii—Te2—O6ix100.85 (16)O2ii—Na—O4i131.48 (14)
O2viii—Te2—O5x99.64 (16)O1i—Na—O4i58.10 (12)
O6ix—Te2—O5x98.64 (16)O5i—Na—O3iii109.39 (14)
O3iv—Fe—O1v101.34 (15)O6ii—Na—O3iii80.11 (13)
O3iv—Fe—O5vi87.79 (15)O3ii—Na—O3iii117.64 (17)
O1v—Fe—O5vi93.64 (15)O2iii—Na—O3iii68.48 (13)
O3iv—Fe—O695.17 (15)O2ii—Na—O3iii168.98 (14)
O1v—Fe—O692.48 (15)O1i—Na—O3iii57.21 (11)
O5vi—Fe—O6172.55 (15)O4i—Na—O3iii58.59 (11)
O3iv—Fe—O4vii174.47 (15)Te1—O1—Feviii140.2 (2)
O1v—Fe—O4vii81.12 (15)Te1—O1—Naxi91.60 (15)
O5vi—Fe—O4vii87.11 (14)Feviii—O1—Naxi94.66 (14)
O6—Fe—O4vii89.65 (14)Te2v—O2—Naxii105.36 (18)
O3iv—Fe—O4vi95.20 (15)Te2v—O2—Navii104.09 (17)
O1v—Fe—O4vi163.16 (15)Naxii—O2—Navii94.82 (15)
O5vi—Fe—O4vi83.80 (14)Te1vii—O3—Fexiii116.98 (18)
O6—Fe—O4vi89.11 (14)Te1vii—O3—Navii114.90 (17)
O4vii—Fe—O4vi82.13 (15)Fexiii—O3—Navii90.19 (14)
O5i—Na—O6ii170.30 (17)Te1vii—O3—Naxii85.51 (13)
O5i—Na—O3ii68.14 (13)Fexiii—O3—Naxii153.87 (17)
O6ii—Na—O3ii106.13 (15)Navii—O3—Naxii91.93 (13)
O5i—Na—O2iii92.37 (15)Te1—O4—Feii113.01 (17)
O6ii—Na—O2iii93.05 (14)Te1—O4—Fexiv143.49 (19)
O3ii—Na—O2iii160.49 (15)Feii—O4—Fexiv97.87 (15)
O5i—Na—O2ii76.12 (14)Te1—O4—Naxi90.52 (14)
O6ii—Na—O2ii94.86 (14)Feii—O4—Naxi135.71 (17)
O3ii—Na—O2ii73.11 (14)Fexiv—O4—Naxi79.65 (12)
O2iii—Na—O2ii102.25 (16)Te2xv—O5—Fexiv131.84 (19)
O5i—Na—O1i115.91 (14)Te2xv—O5—Naxi112.72 (17)
O6ii—Na—O1i67.10 (12)Fexiv—O5—Naxi89.63 (14)
O3ii—Na—O1i68.55 (13)Te2xvi—O6—Fe127.7 (2)
O2iii—Na—O1i124.14 (15)Te2xvi—O6—Navii106.73 (16)
O2ii—Na—O1i129.82 (15)Fe—O6—Navii102.93 (15)
O5i—Na—O4i63.09 (12)
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) x+1, y+1/2, z+1/2; (iii) x+3/2, y, z+1/2; (iv) x+1/2, y+1/2, z; (v) x+1/2, y, z1/2; (vi) x, y+1/2, z+1/2; (vii) x+1, y+1/2, z1/2; (viii) x+1/2, y, z+1/2; (ix) x+1/2, y1/2, z+1; (x) x1/2, y, z+3/2; (xi) x1/2, y+1/2, z; (xii) x+3/2, y, z1/2; (xiii) x+1/2, y1/2, z; (xiv) x, y1/2, z+1/2; (xv) x+1/2, y, z+3/2; (xvi) x+1/2, y+1/2, z+1.

Experimental details

Crystal data
Chemical formulaNaFe(TeO3)2
Mr430.04
Crystal system, space groupOrthorhombic, Pcab
Temperature (K)293
a, b, c (Å)7.8530 (15), 10.448 (2), 13.438 (3)
V3)1102.5 (4)
Z8
Radiation typeMo Kα
µ (mm1)13.15
Crystal size (mm)0.08 × 0.02 × 0.01
Data collection
DiffractometerBruker SMART APEX CCD
Absorption correctionMulti-scan
(SADABS; Bruker, 2002)
Tmin, Tmax0.405, 0.858
No. of measured, independent and
observed [I > 2σ(I)] reflections
11127, 1598, 1329
Rint0.053
(sin θ/λ)max1)0.703
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.027, 0.061, 1.03
No. of reflections1598
No. of parameters91
Δρmax, Δρmin (e Å3)1.77, 0.96

Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), coordinates taken from an isotypic structure, SHELXL97 (Sheldrick, 1997), ATOMS (Dowty, 2006).

Selected bond lengths (Å) top
Na—O5i2.434 (4)Fe—O5vi2.036 (3)
Na—O6ii2.436 (4)Fe—O62.037 (4)
Na—O3ii2.491 (4)Fe—O4vii2.055 (4)
Na—O2iii2.581 (5)Fe—O4vi2.078 (4)
Na—O2ii2.755 (5)Te1—O11.893 (4)
Na—O1i2.758 (4)Te1—O3ii1.901 (4)
Na—O4i2.788 (4)Te1—O41.901 (4)
Na—O3iii2.958 (4)Te2—O2viii1.849 (4)
Fe—O3iv1.942 (4)Te2—O6ix1.892 (4)
Fe—O1v1.955 (4)Te2—O5x1.899 (4)
Symmetry codes: (i) x+1/2, y+1/2, z; (ii) x+1, y+1/2, z+1/2; (iii) x+3/2, y, z+1/2; (iv) x+1/2, y+1/2, z; (v) x+1/2, y, z1/2; (vi) x, y+1/2, z+1/2; (vii) x+1, y+1/2, z1/2; (viii) x+1/2, y, z+1/2; (ix) x+1/2, y1/2, z+1; (x) x1/2, y, z+3/2.
 

Acknowledgements

Financial support by the FWF (Fonds zur Förderung der wissenschaftlichen Forschung), project P19099-N17, is gratefully acknowledged.

References

First citationBruker (2002). SMART, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.  Google Scholar
First citationDolgikh, V. A. (1991). Russ. J. Inorg. Chem. (Eng. Transl.), 36, 1117–1129.  Google Scholar
First citationDowty, E. (2006). ATOMS for Windows. Version 6.3. Shape Software, Kingsport, Tennessee, USA.  Google Scholar
First citationMiletich, R. & Pertlik, F. (1998). J. Alloys Compds, 268, 107–111.  Web of Science CrossRef CAS Google Scholar
First citationSheldrick, G. M. (1997). SHELXL97. University of Göttingen, Germany.  Google Scholar
First citationWeil, M. (2005). Acta Cryst. C61, i103–i105.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationWeil, M. (2007). Z. Anorg. Allg. Chem. 633, 1217–1222.  Web of Science CrossRef CAS Google Scholar
First citationWeil, M. & Stöger, B. (2007). Acta Cryst. E63, i202.  Web of Science CrossRef IUCr Journals Google Scholar

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds