johnnas
第17楼2008/12/09
data for ICSD #44507
Coll Code 44507
Rec Date 2000/12/16
Mod Date 2002/04/01
Chem Name Silver Sulfide - Lt
Structured Ag2 S
Sum Ag2 S1
ANX A2X
Min Name Acanthite
D(calc) 7.25
Title The crystallography of silver sulfide, Ag2 S
Author(s) Frueh, A.J.jr.
Reference Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik, Kristallchemie (-144,1977)
(1958), 110, 136-144
Phase Transition
(1992), 38, 127-220
Unit Cell 4.23 6.91 7.87 90. 99.58 90.
Vol 226.83
Z 4
Space Group P 1 21/n 1
SG Number 14
Cryst Sys monoclinic
Pearson mP12
Wyckoff e3
R Value .27
Red Cell P 4.23 6.91 7.87 90 99.58 90 226.827
Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
Comments Low-temperature polymorph of argentite, stable below 446 K
Stable up to 450 K (2nd ref.)
Compound with mineral name: Acanthite
The structure has been assigned a PDF number: 14-72
Atom # OX SITE x y z SOF H ITF(B)
Ag 1 +1 4 e 0.758 0.015 0.305 1. 0 1.01
Ag 2 +1 4 e 0.285 0.32 0.435 1. 0 1.16
S 1 -2 4 e 0.359 0.239 0.134 1. 0 0.93
*end for ICSD #44507
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