Bull. Minéral. (1981), 104, 757-762.
New data on chlorine sulfosalts
by Vesselina V., BRESKOVSKA (*), Nadejda N., MOZGOVA (**), Nikolay S, BORTNIKOV (*), Anatoly I., GORSHKOV (*) and Anatoly I. TZEPIN (*),
(*) Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM), Academy of Sciences of the USSR, Staromonetny per. 35. Moscow, U.S.S.R. (**) Department of Mineralogy and Crystallography,
University «Kl. Ohridski » Boul. Rousky 15, Sofia 1000, Bulgaria.
Données nouvelles sur les chlorosulfosels.
A new type of natural compounds, chlorine sulfosalts was recently discovered and reported at the Xlth Session of the International Mineralogical Association held in Novosibirsk in September 1978. (Breskovska et al, 1978 ; Moëlo, 1978). Initially the chlorine lead sulfoantimonites with a chlorine content of up to 4.5 wt. % were discovered in the Madjarovo (Bulgaria) polymetallic ore deposit as small inclusions in galena together with Ag-tetrahedrite, pyrostilpnite, nadorite and anglesite. With respect to the contents of Pb and Sb and to the quantitative ratio between these elements the sulfosalts are close to falkmanite, (I�alkmanite, previously disaproved (Strunz, 1978) has been again determinated in a sample from the type locality-Bayerland deposit, Mozgova et al, 1982, bou¬ langerite, semseyite and robinsonite (Breskovska et al, 1978a, 1978b, 1979). Chlorine-sulfosalts with a CI content of up to 4.6 % severe synthesized later under hydrothermal conditions at 300 and 400 °C and in chlorine melts at 300 °C (Bortnikov et al, 1979) Among them the following species were identified : chlorine boulangerite, jamesonite, launayite, heteromorphite
and phase A (4.50 % CI), which is structuraly related to ardaite, B (3.94 % CI) and C (1.25 % CI) which have no analogues among natural minerals.
Another sulfosalt belonging to this group (dadsoni-te) with 0.4 % CI was also identified by Moëlo in the ores of Saint-Pont (France), and Wolfsberg (GDR) (Moëlo, 1978, 1979). In addition this author synthesi¬ zed hydro thermally at 200 °C the phase Y (3.0-3.4 % Cl) which is structurally related with dadsonite and the phase Y' (3.6-4.2 % CI).
Recently another occurrence was reported by Dr. E. A. J. Burke (personal communication, Oct. 8, 1979). The lead chlorine sulfosalts has a chemical composition very similar to that of the Madjarovo minerals. This sulfosalt was identified in the Gruvâsen deposit, Bergsladen district Central Sweden together with sphalerite, pyrrhotite, galena, chalcopyrite, magnetite, pyrargirite, native silver, stannine, arseno-pyrite and nisbite.
The small amount of chlorine (0.15-0.28 wt %) was also established by Jambor and coworkers (Jambor et al, written communication, 1980) in playfairite