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*data for   ICSD #238
Coll Code   238
Rec  Date   1980/01/01
Mod  Date   1997/11/10
Chem Name   Copper Selenide (1.8/1)
Structured  Cu1.8 Se
Sum         Cu1.8 Se1
ANX         N4O7
Min Name    Berzelianite
D(calc)     6.7
Title       Crystal structures of Cu1.8 Se, Cu3 Se2, alpha- and gamma-Cu Se, Cu
            Se2, and Cu Se2 II
Author(s)   Heyding, R.;MacLaren Murray, R.
Reference   Canadian Journal of Chemistry
            (1976), 54, 841-848
Unit Cell   5.765 5.765 5.765 90. 90. 90.
Vol         191.6
Z           4
Space Group F m -3 m
SG Number   225
Cryst Sys   cubic
Pearson     cF11
Wyckoff     f c a
R Value     0.035
Red Cell    F  4.076 4.076 4.076 60 60 60 47.9
Trans Red   0.500 0.500 0.000 / 0.000 0.500 0.500 / 0.500 0.000 0.500
Comments    Total SOF on at least one site differs from unity (SOF <
            0.997 resp. SOF > 1.003)
            Compound with mineral name: Berzelianite
            The structure has been assigned a PDF number: 6-680
            Difference between the formula calculated from the PARM
            record and the FORM record tolerable.
Atom  #   OX   SITE      x           y           z           SOF      H        ITF(B)   
Cu   1  +0    8 c   0.25        0.25        0.25           0.647      0             2.5
Cu   2  +0    32 f  0.3333      0.3333      0.3333         0.063      0             2.5
Se   1  +0    4 a   0           0           0              1.         0              2.
*end for    ICSD #238
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