Ardaite
| Ardaite | |
|---|---|
 Ardaite associated with galenite, Madjarovo polymetallic ore deposit, National Natural History Museum, Sofia, Bulgaria | |
| General | |
| Category | Sulfosalt minerals, Lead minerals |
| Formula (repeating unit) | Pb19Sb13S35Cl7 |
| Strunz classification | 2.LB.30 (10 ed) 2/E.19-20 (8 ed) |
| Dana classification | 02.15.01.01 |
| Crystal system | Monoclinic Unknown space group |
| Identification | |
| Color | Greenish gray or bluish green |
| Mohs scale hardness | 2.5-3 |
| Luster | Metallic |
| Density | 6.44 |
| Pleochroism | Weak |
| References | Breskovska, V. V.; Mozgova, N. N.; Bortnikov, N. S.; Gorshkov, A. I.; Tzepin, A. I. (1982), "Ardaite, a new lead-antimony chlorsulphosalt" (PDF), Mineral. Mag., 46: 357–361 |
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 Cl-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]
References
- ^ a b Mindat information page for Ardaite
- ^ Webmineral information page for Ardaite
- ^ Handbook of Mineralogy information page for Ardaite
- ^ Breskovska, V. V.; Mozgova, N. N.; Bortnikov, N. S.; Gorshkov, A. I.; Tzepin, A. I. (1982), "Ardaite, a new lead-antimony chlorsulphosalt" (PDF), Mineral. Mag., 46: 357–361
- ^ a b Burke, E.A.J.; Kieft, C.; Zakrzewski, M.A. (1981), "The Second Occurrence of Ardaite" (PDF), Canadian Mineralogist, 19: 419–422, retrieved 3 May 2018
- ^ Dunn, Pete; Fleischer, Michael (1983), "New Mineral Names" (PDF), American Mineralogist, 68: 642–45
- ^ Zelenski, Michael; Zunic, Tonci Balic; Bindi, Luca; Caravelli, Anna; Makovicky, Emil; Pinto, Daniela; Vurro, Filippo (2006), "First Occurrence of Iodine in Natural Sulfosalts: The Case of Mutnovscite" (PDF), American Mineralogist, 91: 21–28
- ^ See the Collection of Minerals at the National Natural History Museum, Sofia, Bulgaria
- ^ See the Madjarovo deposit at Mindat.com
See also
