Ardaite

Ardaite
Ardaite associated with galena, Madjarovo polymetallic ore deposit, National Museum of Natural History, Bulgaria
General
Category	Sulfosalt minerals, Lead minerals
Formula (repeating unit)	Pb19Sb13S35Cl7
IMA symbol	Ada[1]
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 (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]

See also

List of minerals recognized by the International Mineralogical Association

References

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. "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. 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.

External links

• Gaines, Richard V.; Skinner, H. Catherine W.; Foord, Eugene E.; Mason, Brian; Rosenzweig, Abraham; King, Vendall (1997). Dana's New Mineralogy: The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana. New York, Chichester, Weinheim, Brisbane, Singapore, Toronto: John Wiley & Sons, Inc. p. 142. ISBN 9780471193104.