Ardaite

Ardaite
Ardaite associated with galena, Madjarovo polymetallic ore deposit, National Museum of Natural History, Bulgaria
General
CategorySulfosalt minerals, Lead minerals
Formula
(repeating unit)		Pb19Sb13S35Cl7
IMA symbolAda[1]
Strunz classification2.LB.30 (10 ed)
2/E.19-20 (8 ed)
Dana classification02.15.01.01
Crystal systemMonoclinic
Unknown space group
Identification
ColorGreenish gray or bluish green
Mohs scale hardness2.5-3
LusterMetallic
Density6.44
PleochroismWeak
ReferencesBreskovska, 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 (340): 357–361, Bibcode:1982MinM...46..357B, doi:10.1180/minmag.1982.046.340.10, S2CID 128756669

Ardaite is a very rare sulfosalt mineral with chemical formula Pb19Sb13S35Cl7 in the monoclinic crystal system,[2][3] named after the Arda River, which passes through the type locality.[4] It was discovered in 1978 and approved by the International Mineralogical Association in 1980.[5][6][7] It was the second well-defined natural chlorosulfosalt, after dadsonite.[8]

Paragenesis of ardaite and galena, Madjarovo ore deposit, Bulgaria, at the National Museum of Natural History, Bulgaria

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.[2]

The type locality is the Madjarovo polymetallic ore deposit in the Rhodope Mountains.[9][10] Later its occurrence was proved in the Gruvåsen deposit, near Filipstad, Bergslagen, Sweden.[6]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b "Information page for Ardaite". mindat.org.
  3. ^ "Information page for Ardaite". webmineral.com.
  4. ^ "Information page for Ardaite" (PDF). Handbook of Mineralogy.
  5. ^ 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 (340): 357–361, Bibcode:1982MinM...46..357B, doi:10.1180/minmag.1982.046.340.10, S2CID 128756669
  6. ^ 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
  7. ^ Dunn, Pete; Fleischer, Michael (1983), "New Mineral Names" (PDF), American Mineralogist, 68: 643
  8. ^ 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, doi:10.2138/am.2006.1870, S2CID 55370927
  9. ^ "Collection of Minerals". National Natural History Museum, Sofia, Bulgaria.
  10. ^ "Madjarovo deposit". mindat.com.