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huahua1216
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3Â¥2008-06-27 13:56:05
huahua1216
ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)
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*data for ICSD #2136 Coll Code 2136 Rec Date 1980/01/01 Chem Name Nickel Silicate - Gamma Structured Ni2 Si O4 Sum Ni2 O4 Si1 ANX AB2X4 D(calc) 5.35 Title Electron-density distribution in crystals of gamma N Si O4 Author(s) Marumo, F.;Isobe, M. Reference Acta Crystallographica B (24,1968-38,1982) (1974), 30, 1904-1906 Unit Cell 8.044(1) 8.044(1) 8.044(1) 90. 90. 90. Vol 520.49 Z 8 Space Group F d -3 m S SG Number 227 Cryst Sys cubic Pearson cF56 Wyckoff e d a R Value .017 Red Cell F 5.687 5.687 5.687 60 60 60 130.124 Trans Red 0.500 0.500 0.000 / 0.000 0.500 0.500 / 0.500 0.000 0.500 Comments Structure type : Al2MgO4 Atom # OX SITE x y z SOF H Ni 1 +2 16 d 0.625 0.625 0.625 1. 0 Si 1 +4 8 a 0 0 0 1. 0 O 1 -2 32 e 0.3689(1) 0.3689(1) 0.3689(1) 1. 0 Lbl Type Beta11 Beta22 Beta33 Beta12 Beta13 Beta23 Ni1 Ni2+ 0.00132(1) 0.00132(1) 0.00132(1) -.00009(3) -.00009(3) -.00009(3) Si1 Si4+ 0.00109(4) 0.00109(4) 0.00109(4) 0 0 0 O1 O2- 0.00152(4) 0.00152(4) 0.00152(4) -.00017(11) -.00017(11) -.00017(11) *end for ICSD #2136 |
2Â¥2008-06-27 13:50:05
xiaoxue7002
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4Â¥2008-06-28 10:44:11
huahua1216
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*data for ICSD #68752 Coll Code 68752 Rec Date 1994/06/30 Mod Date 1999/01/19 Chem Name Nickel Silicate Structured Ni2 (Si O4) Sum Ni2 O4 Si1 ANX AB2X4 Min Name Liebenbergite D(calc) 4.77 Title Precision estimates of interatomic distances using site occupancies, ionization potentials and polarizability in Pbnm silicate olivines Author(s) della Giusta, A.;Ottonello, G.;Secco, L. Reference Acta Crystallographica B (39,1983-) (1990), 46, 160-165 Unit Cell 4.766 10.286 5.953 90. 90. 90. Vol 291.83 Z 4 Space Group P b n m SG Number 62 Cryst Sys orthorhombic Pearson oP28 Wyckoff d c4 a Red Cell P 4.766 5.953 10.286 89.999 89.999 90 291.834 Trans Red 1.000 0.000 0.000 / 0.000 0.000 1.000 / 0.000 -1.000 0.000 Comments PDF 15-388, sample 45, cf. 68751 Compound with mineral name: Liebenbergite The structure has been assigned a PDF number: 15-388 Structure calculated theoretically Structure type : Mg2SiO4 Calculated density unusual but tolerable. No R value given in the paper. At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H Ni 1 +2 4 a 0 0 0 1. 0 Si 1 +4 4 c 0.4296 0.0962 0.25 1. 0 Ni 2 +2 4 c 0.989 0.2781 0.25 1. 0 O 1 -2 4 c 0.7691 0.0919 0.25 1. 0 O 2 -2 4 c 0.2863 -.0499 0.25 1. 0 O 3 -2 8 d 0.2841 0.1649 0.033 1. 0 *end for ICSD #68752 |
5Â¥2008-06-28 10:53:59













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