Sulphosahs of the plagionite group
1969; Cambridge University Press; Volume: 37; Issue: 288 Linguagem: Inglês
10.1180/minmag.1969.037.288.02
ISSN1471-8022
Autores Tópico(s)Mineralogy and Gemology Studies
ResumoSummary Three of the members of the plagionite group, fülöppite Pb 3 S 8 S 15 , plagionite Pb 5 Sb 8 S 17 , and semseyite Pb 9 Sb 8 S 21 , show linear correlations of cell volume and density versus PbS:Sb 2 S 3 mol ratios. This relationship can be used better to define the nature of the fourth member of the group, heteromorphite, Pb 7 Sb 8 S 19 . The cell dimensions derived for heteromorphite are a 13·60, b 11·93, c 21·22 Å, β 90° 50′.
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