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Coll Code 30884 Rec Date 1985/05/29 Mod Date 2007/08/01 Chem Name Calcium Catena-silicate - Ht Structured Ca (Si O3) Sum Ca1 O3 Si1 ANX ABX3 Min Name Parawollastonite D(calc) 2.92 Title Refinement of the crystal structure of wollastonite-2M (parawollastonite) Author(s) Hesse, K.F. Reference Zeitschrift fuer Kristallographie (149,1979-) (1984), 168, 93-98 Phase Transition (1992), 38, 127-220 Unit Cell 15.409(3) 7.322(1) 7.063(1) 90. 95.30(2) 90. Vol 793.47 Z 12 Space Group P 1 21/a 1 SG Number 14 Cryst Sys monoclinic Pearson mP60 Wyckoff e15 R Value .038 Red Cell P 7.063 7.322 15.409 89.999 95.3 89.999 793.474 Trans Red 0.000 0.000 1.000 / 0.000 -1.000 0.000 / 1.000 0.000 0.000 Comments Mean T-O: 1.620, 1.627, 1.635, HT-form (2nd ref., Tomaszewski) Compound with mineral name: Parawollastonite The structure has been assigned a PDF number (calculated powder diffraction data): 01-075-1396 The structure has been assigned a PDF number (experimental powder diffraction data): 43-1460 Structure type : CaSiO3 X-ray diffraction from single crystal Atom # OX SITE x y z SOF H Ca 1 +2 4 e 0.2483 0.3754(2) 0.9726 1. 0 Ca 2 +2 4 e 0.4006 0.6236(6) 0.7389(1) 1. 0 Ca 3 +2 4 e 0.3986 0.1179(6) 0.7360(1) 1. 0 Si 1 +4 4 e 0.4076 0.0920(1) 0.2311(1) 1. 0 Si 2 +4 4 e 0.4075 0.6585(1) 0.2310(1) 1. 0 Si 3 +4 4 e 0.3015 0.3760(1) 0.4436(1) 1. 0 O 1 -2 4 e 0.2991(1) 0.3722(8) 0.6706(2) 1. 0 O 2 -2 4 e 0.2141(1) 0.3737(8) 0.3010(2) 1. 0 O 3 -2 4 e 0.3493(1) 0.1346(16) 0.0354(2) 1. 0 O 4 -2 4 e 0.3479(1) 0.6121(15) 0.0361(2) 1. 0 O 5 -2 4 e 0.5096(1) 0.1187(15) 0.2369(2) 1. 0 O 6 -2 4 e 0.5088(1) 0.6134(13) 0.2332(3) 1. 0 O 7 -2 4 e 0.3641(1) 0.1969(3) 0.4060(3) 1. 0 O 8 -2 4 e 0.3640(1) 0.5553(3) 0.4075(3) 1. 0 O 9 -2 4 e 0.3908(1) 0.8753(3) 0.2753(2) 1. 0 Lbl Type U11 U22 U33 U12 U13 U23 Ca1 Ca2+ 0.0068(1) 0.0069(1) 0.0071(1) -0.0001(2) 0.0010(1) -0.0002(4) Ca2 Ca2+ 0.0078(2) 0.0075(2) 0.0076(1) -0.0010(4) 0.0013(1) -0.0012(4) Ca3 Ca2+ 0.0086(2) 0.0054(5) 0.0073(1) 0.0009(3) 0.0012(1) 0.0007(3) Si1 Si4+ 0.0058(3) 0.0055(4) 0.0058(2) 0.0002(2) 0.0003(2) -0.0006(2) Si2 Si4+ 0.0057(3) 0.0065(4) 0.0058(2) 0.0000(2) -0.0001(2) 0.0005(2) Si3 Si4+ 0.0061(2) 0.0066(2) 0.0046(2) 0.0003(3) 0.0001(1) 0.0001(3) O1 O2- 0.0091(5) 0.0101(6) 0.0045(5) 0.0021(10) 0.0009(4) -0.0019(9) O2 O2- 0.0074(5) 0.0114(6) 0.0075(5) 0.0031(10) -0.0012(4) -0.0031(11) O3 O2- 0.0082(6) 0.0149(21) 0.0065(5) 0.0020(11) -0.0006(4) 0.0009(10) O4 O2- 0.0083(6) 0.0078(23) 0.0065(5) -0.001(1) -0.0009(4) 0.0002(9) O5 O2- 0.0059(6) 0.0077(15) 0.0176(7) -0.0013(8) 0.0004(5) 0.0019(9) O6 O2- 0.0063(6) 0.0044(21) 0.0176(7) -0.0010(7) 0.0001(5) 0.0016(9) O7 O2- 0.0107(9) 0.0095(8) 0.0076(7) 0.0029(6) 0.0015(6) -0.0018(6) O8 O2- 0.0124(9) 0.0097(8) 0.0074(7) -0.0036(6) 0.0003(6) 0.0021(6) O9 O2- 0.0158(6) 0.0063(5) 0.0143(6) 0.0002(8) 0.0031(5) -0.0006(8) |
3Â¥2011-11-23 15:55:06
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Coll Code 20571 Rec Date 1980/01/01 Mod Date 2006/04/01 Chem Name Calcium Catena-silicate Structured Ca (Si O3) Sum Ca1 O3 Si1 ANX ABX3 Min Name Wollastonite 1A D(calc) 2.93 Title The crystal structure of wollastonite Author(s) Mamedov, Kh.S.;Belov, N.V. Reference Doklady Akademii Nauk SSSR (1956), 107, 463-466 Golden Book of Phase Transitions, Wroclaw (2002), 1, 1-123 Unit Cell 7.896 7.285 7.084 90. 95.27 103.37 Vol 394.67 Z 6 Space Group P -1 SG Number 2 Cryst Sys triclinic Pearson aP30 Wyckoff i15 R Value .24 Red Cell P 7.084 7.285 7.896 103.37 95.27 90 394.674 Trans Red 0.000 0.000 -1.000 / 0.000 -1.000 0.000 / -1.000 0.000 0.000 Comments Pyroxenoid group Stable up to 1500 K (2nd ref., Tomaszewski), above P21/a Compound with mineral name: Wollastonite 1A The structure has been assigned a PDF number (calculated powder diffraction data): 01-072-2284 The structure has been assigned a PDF number (experimental powder diffraction data): 42-547 Structure type : CaSiO3(HP) X-ray diffraction from single crystal Unusual difference between calculated and measured density At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H Ca 1 +2 2 i 0 0.25 0 1. 0 Ca 2 +2 2 i 0.703 -.074 0.263 1. 0 Ca 3 +2 2 i 0.703 0.426 0.263 1. 0 Si 1 +4 2 i 0.313 0.033 0.232 1. 0 Si 2 +4 2 i 0.313 0.623 0.232 1. 0 Si 3 +4 2 i 0.099 0.275 0.443 1. 0 O 1 -2 2 i 0.094 0.274 0.667 1. 0 O 2 -2 2 i 0.094 0.774 0.667 1. 0 O 3 -2 2 i 0.19 0.05 0.047 1. 0 O 4 -2 2 i 0.19 0.55 0.047 1. 0 O 5 -2 2 i 0.515 0.129 0.229 1. 0 O 6 -2 2 i 0.515 0.629 0.229 1. 0 O 7 -2 2 i 0.224 0.129 0.406 1. 0 O 8 -2 2 i 0.224 0.483 0.406 1. 0 O 9 -2 2 i 0.313 0.828 0.232 1. 0 |
2Â¥2011-11-23 15:53:08
zhangzhikun
Ìú¸Ëľ³æ (ÖøÃûдÊÖ)
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4Â¥2012-09-23 16:25:01
zhangzhikun
Ìú¸Ëľ³æ (ÖøÃûдÊÖ)
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5Â¥2012-09-23 16:33:57













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