Jurbanite
(repeating unit)AlSO4(OH)·5H2O IMA symbol Jur[1] Strunz classification 7.DB.15 Dana classification 31.9.10.1 Crystal system Monoclinic Crystal class Prismatic (2/m)
(same H-M symbol) Space group P21/n Identification Color Colorless Crystal habit Small crystals and stalactitic forms Tenacity Brittle Mohs scale hardness 2.5 Luster Vitreous Diaphaneity Transparent Specific gravity 1.786 Optical properties Biaxial (-) Refractive index nα = 1.459 nβ = 1.473 nγ = 1.483 Birefringence δ = 0.024 2V angle Measured: 80° Solubility Soluble in water References [2][3][4]
(same H-M symbol)
Jurbanite is a sulfate mineral with the chemical formula AlSO4(OH)·5H2O. Its molecular weight is 230.13 g/mol. It crystallizes in the monoclinic system and is dimorphous with the orthorhombic mineral rostite.[2] Jurbanite occurs as a secondary (post-mine) mineral in mines containing sulfide minerals.[3]
Jurbanite was first described for an occurrence in the San Manuel mine of Pinal County, Arizona and first described in 1976s. It was named for Joseph John Urban, the mineral collector who discovered it.[2]
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 Mindat.org - Jurbanite
- ^ a b Webmineral - Jurbanite
- ^ "Handbook of Mineralogy - Jurbanite" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2013-01-25.
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