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caoqigao

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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
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xiexie99

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ÒýÓûØÌû:
Originally posted by caoqigao at 2007-11-22 18:38:
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
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