Open AccessMineralogy of some Ag-(Cu)-Pb-Bi sulphide associations
Author(s) -
Sven Karup-Møller,
Sven Karup-Møller
Publication year - 1977
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1976-26-03
Subject(s) - electron microprobe , crystallography , mineral , homologous series , group (periodic table) , microprobe , crystallization , space group , mineralogy , chemistry , materials science , x ray crystallography , metallurgy , physics , optics , diffraction , organic chemistry
Microprobe analyses and x-ray crystallographic studies have resulted in the discovery of the following new minerals: vikingite (Ag1.ooPb2.,o8b.ooS,.,, Z = 4, a= 13.603(6)A, b = 25.248(7)A, c = 4. I 12(4)A, 'Y = 95.55(3)°, space group: B2/m or Bm), eskimoite (Ag1.,0Pb,.00Bh.,0S•, Z = 4, a = 13.459(5)A, b = 3O.!94(8)A,c = 4.100(5)A;'Y = 93.35(5)0, space group: 82/m or Bm),ourayite (Ag12.,Pbi,8i20.,Ss,, Z = I, a = 13.457(14)A, b = 44.042(40)1\, c = 4.10O(\O)A, space group: Bbmm or Bb2,m) and treasurite (Ag,.,, P!,i°.soBi,.,,Ss, t. = 4,a = 13.349(\O)A, b = 26.538(2O)A, c = 4.092(7), 'Y = 92.77(7)0, space group: 82/m, B2 or Bm). Several related mineral varieties are partly described. Their compositions have been determined but they are present in insufficient amounts for x-ray crystallographic examinations. They have not been given names. Microprobe analyses are given for associated minerals: members of the lillianite-gustavite solid solution series, heyrovskyite, galena, galenobismutite, members of the bismuthinite-aikinite series and berryite. Crystallization sequences and temperatures of formations are described and discussed. The new mineral species, the unnamed mineral varieties, the members of the lillianite-gustavite solid solution series and heyrovskyite belong to the "lillianite homologous series" (LHS).