Felsőbányaite
(same H-M symbol)
c = 11.115 Å; β = 104.34°; Z = 4
Felsőbányaite or basaluminite is a hydrated aluminium sulfate mineral with formula: Al4(SO4)(OH)10·4H2O. It is a rare white to pale yellow mineral which typically occurs as globular masses and incrustations or as minute rhombic crystals. It crystallizes in the monoclinic crystal system.[3][2]
It occurs as a weathering product under acidic conditions associated with pyrite or marcasite decomposition. Associated minerals include hydrobasaluminite, hydroargillite, meta-aluminite, allophane, gibbsite, gypsum and aragonite.[3]
Felsőbányaite was first described in 1853 for an occurrence in the Baia Sprie mine, Baia Sprie (Felsőbánya), Maramureș County, Romania, and named for the locality.[2] The mineral name basaluminite was used for an occurrence of the same mineral in England in 1948 and discredited by the International Mineralogical Association (IMA) in 2006.[4]
References
- ^ 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.
- ^ a b c Felsőbányaite on Mindat.org
- ^ a b c Basaluminite in the Handbook of Mineralogy
- ^ "Burke, E. A. (2006) A mass discreditation of GQN minerals, The Canadian Mineralogist, 44(6), pp. 1557-1560" (PDF). Archived from the original (PDF) on 2012-03-26. Retrieved 2014-07-29.
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