Английская Википедия:Ardaite
Ardaite is a very rare sulfosalt mineral with chemical formula Pb19Sb13S35Cl7 in the monoclinic crystal system,[1][2] named after the Arda River, which passes through the type locality.[3] It was discovered in 1978 and approved by the International Mineralogical Association in 1980.[4][5][6] It was the second well-defined natural chlorosulfosalt, after dadsonite.[7]
Greenish gray or bluish green in color, its luster is metallic. Ardaite occurs as 50 µm fine-grained aggregates of acicular crystals associated with galena, pyrostilpnite, anglesite, nadorite, and chlorine-bearing robinsonite and semseyite, in the Madjarovo polymetallic ore deposit in Bulgaria. Ardaite has a hardness of 2.5 to 3 on Mohs scale and a density of approximately 6.44.[1]
The type locality is the Madjarovo polymetallic ore deposit in the Rhodope Mountains.[8][9] Later its occurrence was proved in the Gruvåsen deposit, near Filipstad, Bergslagen, Sweden.[5] Шаблон:Clear left
See also
List of minerals recognized by the International Mineralogical Association
References
External links
