Ardaite—A New Lead-Antimony Chlorosulphosalt

V. V. Breskovska, N. N. Mozgova, N. S. Bortnikov, A. I. Gorshkov and A. I. Tsepin
Dept. of Mineralogy and Crystallography, ‘Kliment Ohridski’, University of Sofia, Bulgaria
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM), Academy of Sciences of the USSR, Staromonetny per. 35, Moscow 109017, USSR

Abstract: The first occurrence of new mineral ardaite (a chlorine sulphosalt) has been discovered in the Madjarovo polymetallic ore deposit (Bulgaria). The average composition is Pb 56.50, Ag 0.04, Sb 22.48, S 15.56, Cl 3.78, total 98.36 wt.%. The formula is Pb20–18 Sb12–24S34–36.5Cl6–8. The mineral occurs as fine acicular aggregates associated with galena, nadorite, a Cl-bearing robinsonite and Cl-beating semseyite, pyrostilpnite, silver- bearing tetrahedrite and anglesite.

Mineralogical Magazine; September 1982 v. 46; no. 340; p. 357-361; DOI: 10.1180/minmag.1982.046.340.10
© 1982, The Mineralogical Society
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