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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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