Jurbanite

(repeating unit)AlSO4(OH)·5H2OIMA symbolJur[1]Strunz classification7.DB.15Dana classification31.9.10.1Crystal systemMonoclinicCrystal classPrismatic (2/m)
(same H-M symbol)Space groupP21/nIdentificationColorColorlessCrystal habitSmall crystals and stalactitic formsTenacityBrittleMohs scale hardness2.5LusterVitreousDiaphaneityTransparentSpecific gravity1.786Optical propertiesBiaxial (-)Refractive indexnα = 1.459 nβ = 1.473 nγ = 1.483Birefringenceδ = 0.0242V angleMeasured: 80°SolubilitySoluble in waterReferences[2][3][4]

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

  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 c Mindat.org - Jurbanite
  3. ^ a b Webmineral - Jurbanite
  4. ^ "Handbook of Mineralogy - Jurbanite" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2013-01-25.


  • v
  • t
  • e