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ICSD #30445 Coll Code 30445 Rec Date 1980/01/01 Mod Date 2007/08/01 Chem Name Silver Sulfide - Alpha Structured Ag2 S Sum Ag2 S1 ANX A2X Min Name Acanthite D(calc) 7.63 Title X-ray study on the alpha - beta transition of Ag2 O Author(s) Sadanaga, R.;Sueno, S. Reference Mineralogical Journal (Japan) (1967), 5, 124-148 Unit Cell 4.231 6.93 9.526 90. 129.48 90. Vol 215.58 Z 4 Space Group P 1 21/c 1 SG Number 14 Cryst Sys monoclinic Pearson mP12 Wyckoff e3 R Value .168 Red Cell P 4.231 6.93 7.575 90 103.944 90 215.585 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 1.000 0.000 1.000 Comments Low-temperature polymorph of argentite, stable below 446 K Cell in P121/n1-setting: c'=7.575, beta'=103.94 Compound with mineral name: Acanthite The structure has been assigned a PDF number (calculated powder diffraction data): 01-075-1061 The structure has been assigned a PDF number (experimental powder diffraction data): 14-72 Structure determined on a twinned crystal X-ray diffraction from single crystal Unusual difference between calculated and measured density Atom # OX SITE x y z SOF H ITF(B) Ag 1 +1 4 e 0.0712(11) 0.0169(8) 0.3075(5) 1. 0 4.27(9) Ag 2 +1 4 e 0.7259(9) 0.3213(8) 0.4362(4) 1. 0 3.65(8) S 1 -2 4 e 0.5000(25) 0.2383(19) 0.1306(11) 1. 0 1.96(17) *end for ICSD #30445 |
2Â¥2007-11-22 18:38:47
xiexie99
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3Â¥2007-11-22 18:44:24
caoqigao
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4Â¥2007-11-22 19:48:59
dwma
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5Â¥2007-11-22 21:14:41














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