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Definitive data on bohdanowiczite, a new silver bismuth selenide

Published online by Cambridge University Press:  05 July 2018

M. Banaś ,
D. Atkin ,
J. F. W. Bowles  and
P. R. Simpson
M. Banaś
Affiliation:
Academy of Mining and Metallurgy, Institute of Geology and Mineral Deposits, CracowPoland
D. Atkin
Affiliation:
Geochemical Division, Institute of Geological Sciences, 64/78 Gray's Inn Road, London WC1X 8NG
J. F. W. Bowles
Affiliation:
Geochemical Division, Institute of Geological Sciences, 64/78 Gray's Inn Road, London WC1X 8NG
P. R. Simpson
Affiliation:
Geochemical Division, Institute of Geological Sciences, 64/78 Gray's Inn Road, London WC1X 8NG
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Summary

Bohdanowiczite was first described in 1967 but incomplete data prevented its acceptance as a new mineral at that time. Additional data on the same material now characterize bohdanowiczite as a new species with the formula:

3[(Ag0.98Cu0.02)0.97(Bi0.97Pb0.03)1.02(Se0.83S0.17)2.01]

The mineral occurs in intimate intergrowths with clausthalite and wittichenite in polymetallic mineralization at Kletno in Poland. In reflected light bohdanowiczite has a creamy-yellow colour and short polysynthetic twinning is frequently observed. Cell parameters indexed on a hexagonal lattice are a = 4.183±0.008 Å and c = 19.561± 0.016 Å. Pm1 is the most likely space group. The strongest lines of the powder pattern are 2.91(100), 2.03(30), 3.40(20), 6.54(20), 2.09(18), 3.26(18). The calculated density is 7.72 gm/cm3 and the VHN between 63 and 96 kg/mm2.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 325 , March 1979 , pp. 131 - 133
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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References

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