Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805021343/br6195sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536805021343/br6195Isup2.hkl |
Data collection: KM4B8 (Galdecki et al., 1996); cell refinement: KM4B8; data reduction: JANA2000 (Petricek et al., 2000); program(s) used to solve structure: JANA2000; program(s) used to refine structure: JANA2000; molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: JANA2000.
LaMg2 | Dx = 3.642 Mg m−3 |
Mr = 187.53 | Mo Kα radiation, λ = 0.71069 Å |
Cubic, Fd3m | Cell parameters from 25 reflections |
Hall symbol: -F 4vw 2vw 3 | θ = 2.2–27° |
a = 8.810 (2) Å | µ = 12.55 mm−1 |
V = 683.8 (3) Å3 | T = 295 K |
Z = 8 | Elongated tablet, colorless |
F(000) = 648 | 0.36 × 0.1 × 0.07 mm |
Oxford Diffraction point-detector diffractometer | 46 reflections with I > 3σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.031 |
Graphite monochromator | θmax = 26.6°, θmin = 4.0° |
ω/2θ scans | h = −11→11 |
Absorption correction: gaussian (JANA2000; Petricek et al., 2000) | k = −11→11 |
Tmin = 0.323, Tmax = 0.550 | l = 0→11 |
648 measured reflections | 3 standard reflections every 100 reflections |
50 independent reflections | intensity decay: 1.1% |
Refinement on F2 | Primary atom site location: Patterson |
R[F > 3σ(F)] = 0.008 | Secondary atom site location: difference Fourier map |
wR(F) = 0.025 | Weighting scheme based on measured s.u.'s w = 1/(σ2(I) + 0.0004I2) |
S = 1.14 | (Δ/σ)max = 0.002 |
50 reflections | Δρmax = 0.11 e Å−3 |
4 parameters | Δρmin = −0.09 e Å−3 |
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. |
x | y | z | Uiso*/Ueq | ||
La1 | 0.625 | 0.625 | 0.125 | 0.0195 (2) | |
Mg1 | 0 | 0.5 | 0 | 0.0145 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
La1 | 0.0195 (2) | 0.0195 (2) | 0.0195 (2) | 0 | 0 | 0 |
Mg1 | 0.0145 (3) | 0.0145 (3) | 0.0145 (3) | −0.0012 (5) | −0.0012 (5) | −0.0012 (5) |
La1—Mg1i | 3.6524 (8) | La1—Mg1x | 3.6524 (8) |
La1—Mg1ii | 3.6524 (8) | La1—Mg1xi | 3.6524 (8) |
La1—Mg1iii | 3.6524 (8) | La1—Mg1xii | 3.6524 (8) |
La1—Mg1iv | 3.6524 (8) | Mg1—Mg1xiii | 3.1148 (7) |
La1—Mg1v | 3.6524 (8) | Mg1—Mg1xiv | 3.1148 (7) |
La1—Mg1vi | 3.6524 (8) | Mg1—Mg1vii | 3.1148 (7) |
La1—Mg1vii | 3.6524 (8) | Mg1—Mg1xv | 3.1148 (7) |
La1—Mg1viii | 3.6524 (8) | Mg1—Mg1xvi | 3.1148 (7) |
La1—Mg1ix | 3.6524 (8) | Mg1—Mg1xii | 3.1148 (7) |
Mg1i—La1—Mg1ii | 117.036 | Mg1xi—La1—Mg1v | 50.479 |
Mg1i—La1—Mg1iii | 117.036 | Mg1xi—La1—Mg1vi | 95.216 |
Mg1i—La1—Mg1iv | 95.216 | Mg1xi—La1—Mg1vii | 95.216 |
Mg1i—La1—Mg1v | 95.216 | Mg1xi—La1—Mg1viii | 144.903 |
Mg1i—La1—Mg1vi | 50.479 | Mg1xi—La1—Mg1ix | 50.479 |
Mg1i—La1—Mg1vii | 144.903 | Mg1xi—La1—Mg1x | 117.036 |
Mg1i—La1—Mg1viii | 95.216 | Mg1xi—La1—Mg1xii | 117.036 |
Mg1i—La1—Mg1ix | 50.479 | Mg1xii—La1—Mg1i | 144.903 |
Mg1i—La1—Mg1x | 95.216 | Mg1xii—La1—Mg1ii | 50.479 |
Mg1i—La1—Mg1xi | 50.479 | Mg1xii—La1—Mg1iii | 95.216 |
Mg1i—La1—Mg1xii | 144.903 | Mg1xii—La1—Mg1iv | 50.479 |
Mg1ii—La1—Mg1i | 117.036 | Mg1xii—La1—Mg1v | 95.216 |
Mg1ii—La1—Mg1iii | 117.036 | Mg1xii—La1—Mg1vi | 144.903 |
Mg1ii—La1—Mg1iv | 50.479 | Mg1xii—La1—Mg1vii | 50.479 |
Mg1ii—La1—Mg1v | 144.903 | Mg1xii—La1—Mg1viii | 95.216 |
Mg1ii—La1—Mg1vi | 95.216 | Mg1xii—La1—Mg1ix | 95.216 |
Mg1ii—La1—Mg1vii | 95.216 | Mg1xii—La1—Mg1x | 117.036 |
Mg1ii—La1—Mg1viii | 50.479 | Mg1xii—La1—Mg1xi | 117.036 |
Mg1ii—La1—Mg1ix | 95.216 | La1xvii—Mg1—La1xviii | 117.036 |
Mg1ii—La1—Mg1x | 95.216 | La1xvii—Mg1—La1xix | 117.036 |
Mg1ii—La1—Mg1xi | 144.903 | La1xvii—Mg1—La1xx | 180 |
Mg1ii—La1—Mg1xii | 50.479 | La1xvii—Mg1—La1xxi | 62.964 |
Mg1iii—La1—Mg1i | 117.036 | La1xvii—Mg1—La1xxii | 62.964 |
Mg1iii—La1—Mg1ii | 117.036 | La1xvii—Mg1—Mg1xiii | 115.239 |
Mg1iii—La1—Mg1iv | 144.903 | La1xvii—Mg1—Mg1xiv | 64.761 |
Mg1iii—La1—Mg1v | 50.479 | La1xvii—Mg1—Mg1vii | 115.239 |
Mg1iii—La1—Mg1vi | 95.216 | La1xvii—Mg1—Mg1xv | 64.761 |
Mg1iii—La1—Mg1vii | 50.479 | La1xvii—Mg1—Mg1xvi | 64.761 |
Mg1iii—La1—Mg1viii | 95.216 | La1xvii—Mg1—Mg1xii | 115.239 |
Mg1iii—La1—Mg1ix | 144.903 | La1xviii—Mg1—La1xvii | 117.036 |
Mg1iii—La1—Mg1x | 50.479 | La1xviii—Mg1—La1xix | 117.036 |
Mg1iii—La1—Mg1xi | 95.216 | La1xviii—Mg1—La1xx | 62.964 |
Mg1iii—La1—Mg1xii | 95.216 | La1xviii—Mg1—La1xxi | 180 |
Mg1iv—La1—Mg1i | 95.216 | La1xviii—Mg1—La1xxii | 62.964 |
Mg1iv—La1—Mg1ii | 50.479 | La1xviii—Mg1—Mg1xiii | 64.761 |
Mg1iv—La1—Mg1iii | 144.903 | La1xviii—Mg1—Mg1xiv | 115.239 |
Mg1iv—La1—Mg1v | 117.036 | La1xviii—Mg1—Mg1vii | 64.761 |
Mg1iv—La1—Mg1vi | 117.036 | La1xviii—Mg1—Mg1xv | 115.239 |
Mg1iv—La1—Mg1vii | 95.216 | La1xviii—Mg1—Mg1xvi | 64.761 |
Mg1iv—La1—Mg1viii | 95.216 | La1xviii—Mg1—Mg1xii | 115.239 |
Mg1iv—La1—Mg1ix | 50.479 | La1xix—Mg1—La1xvii | 117.036 |
Mg1iv—La1—Mg1x | 144.903 | La1xix—Mg1—La1xviii | 117.036 |
Mg1iv—La1—Mg1xi | 95.216 | La1xix—Mg1—La1xx | 62.964 |
Mg1iv—La1—Mg1xii | 50.479 | La1xix—Mg1—La1xxi | 62.964 |
Mg1v—La1—Mg1i | 95.216 | La1xix—Mg1—La1xxii | 180 |
Mg1v—La1—Mg1ii | 144.903 | La1xix—Mg1—Mg1xiii | 64.761 |
Mg1v—La1—Mg1iii | 50.479 | La1xix—Mg1—Mg1xiv | 115.239 |
Mg1v—La1—Mg1iv | 117.036 | La1xix—Mg1—Mg1vii | 115.239 |
Mg1v—La1—Mg1vi | 117.036 | La1xix—Mg1—Mg1xv | 64.761 |
Mg1v—La1—Mg1vii | 50.479 | La1xix—Mg1—Mg1xvi | 115.239 |
Mg1v—La1—Mg1viii | 144.903 | La1xix—Mg1—Mg1xii | 64.761 |
Mg1v—La1—Mg1ix | 95.216 | La1xx—Mg1—La1xvii | 180 |
Mg1v—La1—Mg1x | 95.216 | La1xx—Mg1—La1xviii | 62.964 |
Mg1v—La1—Mg1xi | 50.479 | La1xx—Mg1—La1xix | 62.964 |
Mg1v—La1—Mg1xii | 95.216 | La1xx—Mg1—La1xxi | 117.036 |
Mg1vi—La1—Mg1i | 50.479 | La1xx—Mg1—La1xxii | 117.036 |
Mg1vi—La1—Mg1ii | 95.216 | La1xx—Mg1—Mg1xiii | 64.761 |
Mg1vi—La1—Mg1iii | 95.216 | La1xx—Mg1—Mg1xiv | 115.239 |
Mg1vi—La1—Mg1iv | 117.036 | La1xx—Mg1—Mg1vii | 64.761 |
Mg1vi—La1—Mg1v | 117.036 | La1xx—Mg1—Mg1xv | 115.239 |
Mg1vi—La1—Mg1vii | 144.903 | La1xx—Mg1—Mg1xvi | 115.239 |
Mg1vi—La1—Mg1viii | 50.479 | La1xx—Mg1—Mg1xii | 64.761 |
Mg1vi—La1—Mg1ix | 95.216 | La1xxi—Mg1—La1xvii | 62.964 |
Mg1vi—La1—Mg1x | 50.479 | La1xxi—Mg1—La1xviii | 180 |
Mg1vi—La1—Mg1xi | 95.216 | La1xxi—Mg1—La1xix | 62.964 |
Mg1vi—La1—Mg1xii | 144.903 | La1xxi—Mg1—La1xx | 117.036 |
Mg1vii—La1—Mg1i | 144.903 | La1xxi—Mg1—La1xxii | 117.036 |
Mg1vii—La1—Mg1ii | 95.216 | La1xxi—Mg1—Mg1xiii | 115.239 |
Mg1vii—La1—Mg1iii | 50.479 | La1xxi—Mg1—Mg1xiv | 64.761 |
Mg1vii—La1—Mg1iv | 95.216 | La1xxi—Mg1—Mg1vii | 115.239 |
Mg1vii—La1—Mg1v | 50.479 | La1xxi—Mg1—Mg1xv | 64.761 |
Mg1vii—La1—Mg1vi | 144.903 | La1xxi—Mg1—Mg1xvi | 115.239 |
Mg1vii—La1—Mg1viii | 117.036 | La1xxi—Mg1—Mg1xii | 64.761 |
Mg1vii—La1—Mg1ix | 117.036 | La1xxii—Mg1—La1xvii | 62.964 |
Mg1vii—La1—Mg1x | 95.216 | La1xxii—Mg1—La1xviii | 62.964 |
Mg1vii—La1—Mg1xi | 95.216 | La1xxii—Mg1—La1xix | 180 |
Mg1vii—La1—Mg1xii | 50.479 | La1xxii—Mg1—La1xx | 117.036 |
Mg1viii—La1—Mg1i | 95.216 | La1xxii—Mg1—La1xxi | 117.036 |
Mg1viii—La1—Mg1ii | 50.479 | La1xxii—Mg1—Mg1xiii | 115.239 |
Mg1viii—La1—Mg1iii | 95.216 | La1xxii—Mg1—Mg1xiv | 64.761 |
Mg1viii—La1—Mg1iv | 95.216 | La1xxii—Mg1—Mg1vii | 64.761 |
Mg1viii—La1—Mg1v | 144.903 | La1xxii—Mg1—Mg1xv | 115.239 |
Mg1viii—La1—Mg1vi | 50.479 | La1xxii—Mg1—Mg1xvi | 64.761 |
Mg1viii—La1—Mg1vii | 117.036 | La1xxii—Mg1—Mg1xii | 115.239 |
Mg1viii—La1—Mg1ix | 117.036 | Mg1xiii—Mg1—Mg1xiv | 180 |
Mg1viii—La1—Mg1x | 50.479 | Mg1xiii—Mg1—Mg1vii | 120 |
Mg1viii—La1—Mg1xi | 144.903 | Mg1xiii—Mg1—Mg1xv | 60 |
Mg1viii—La1—Mg1xii | 95.216 | Mg1xiii—Mg1—Mg1xvi | 60 |
Mg1ix—La1—Mg1i | 50.479 | Mg1xiii—Mg1—Mg1xii | 120 |
Mg1ix—La1—Mg1ii | 95.216 | Mg1xiv—Mg1—Mg1xiii | 180 |
Mg1ix—La1—Mg1iii | 144.903 | Mg1xiv—Mg1—Mg1vii | 60 |
Mg1ix—La1—Mg1iv | 50.479 | Mg1xiv—Mg1—Mg1xv | 120 |
Mg1ix—La1—Mg1v | 95.216 | Mg1xiv—Mg1—Mg1xvi | 120 |
Mg1ix—La1—Mg1vi | 95.216 | Mg1xiv—Mg1—Mg1xii | 60 |
Mg1ix—La1—Mg1vii | 117.036 | Mg1vii—Mg1—Mg1xiii | 120 |
Mg1ix—La1—Mg1viii | 117.036 | Mg1vii—Mg1—Mg1xiv | 60 |
Mg1ix—La1—Mg1x | 144.903 | Mg1vii—Mg1—Mg1xv | 180 |
Mg1ix—La1—Mg1xi | 50.479 | Mg1vii—Mg1—Mg1xvi | 120 |
Mg1ix—La1—Mg1xii | 95.216 | Mg1vii—Mg1—Mg1xii | 60 |
Mg1x—La1—Mg1i | 95.216 | Mg1xv—Mg1—Mg1xiii | 60 |
Mg1x—La1—Mg1ii | 95.216 | Mg1xv—Mg1—Mg1xiv | 120 |
Mg1x—La1—Mg1iii | 50.479 | Mg1xv—Mg1—Mg1vii | 180 |
Mg1x—La1—Mg1iv | 144.903 | Mg1xv—Mg1—Mg1xvi | 60 |
Mg1x—La1—Mg1v | 95.216 | Mg1xv—Mg1—Mg1xii | 120 |
Mg1x—La1—Mg1vi | 50.479 | Mg1xvi—Mg1—Mg1xiii | 60 |
Mg1x—La1—Mg1vii | 95.216 | Mg1xvi—Mg1—Mg1xiv | 120 |
Mg1x—La1—Mg1viii | 50.479 | Mg1xvi—Mg1—Mg1vii | 120 |
Mg1x—La1—Mg1ix | 144.903 | Mg1xvi—Mg1—Mg1xv | 60 |
Mg1x—La1—Mg1xi | 117.036 | Mg1xvi—Mg1—Mg1xii | 180 |
Mg1x—La1—Mg1xii | 117.036 | Mg1xii—Mg1—Mg1xiii | 120 |
Mg1xi—La1—Mg1i | 50.479 | Mg1xii—Mg1—Mg1xiv | 60 |
Mg1xi—La1—Mg1ii | 144.903 | Mg1xii—Mg1—Mg1vii | 60 |
Mg1xi—La1—Mg1iii | 95.216 | Mg1xii—Mg1—Mg1xv | 120 |
Mg1xi—La1—Mg1iv | 95.216 | Mg1xii—Mg1—Mg1xvi | 180 |
Symmetry codes: (i) x+1, y, z; (ii) x+1/2, y, z+1/2; (iii) x+1/2, y+1/2, z; (iv) −y+1, x+1/4, z+1/4; (v) −y+1, x+3/4, z−1/4; (vi) −y+3/2, x+3/4, z+1/4; (vii) −x+1/4, −y+5/4, z; (viii) −x+3/4, −y+5/4, z+1/2; (ix) −x+3/4, −y+3/4, z; (x) y+1/4, −x+1, z+1/4; (xi) y+1/4, −x+1/2, z−1/4; (xii) y−1/4, −x+1/2, z+1/4; (xiii) −y+1/2, x+1/4, z−1/4; (xiv) −y+1/2, x+3/4, z+1/4; (xv) −x−1/4, −y+3/4, z; (xvi) y−3/4, −x+1/2, z−1/4; (xvii) x−1, y, z; (xviii) x−1/2, y, z−1/2; (xix) x−1/2, y−1/2, z; (xx) −x+1, −y+1, −z; (xxi) −x+1/2, −y+1, −z+1/2; (xxii) −x+1/2, −y+3/2, −z. |