Crystal Structure of Kobellite
Abstract
THE study of the crystal structure of the mineral kobellite is interesting for two reasons. First, measured by its cell volume it is one of the largest sulfosalt structures without superstructure, having cell dimensions a ~ 22.5 Å, b ~ 34.0 Å, c ~ 4.02 Å, α = β = γ = 90.0°, these being dependent on the occurrence of the crystals. Second, significantly different chemical constitutions and space groups have been reported: 6PbS.2Bi2S3.Sb2S3 or 6PbS.FeS.Bi2S3.Sb2S3, Z=4, Pnmm (ref. 1), 5PbS.4(Bi,Sb)2S3 with Bi: Sb = (0-1, 6):1, Z=4, Pnnm or Pnmm (ref. 2), (Pb5.20,Ag0.12)5.32Fe0.93Bi3.78Sb1.94-S16, Z=4, probably Pnmm (ref. 3).
- Publication:
-
Nature Physical Science
- Pub Date:
- June 1971
- DOI:
- 10.1038/physci231133a0
- Bibcode:
- 1971NPhS..231..133M