Carobbiite

Mineral

(repeating unit)KFIMA symbolCrb[1]Strunz classification3.AA.20Dana classification9.1.1.4Crystal systemIsometric - HexoctahedralCrystal classm3m (4/m 3 2/m) - HexoctahedralSpace groupCubicUnit cell152.27 ųIdentificationFormula mass58.10 gmColourColorlessCleavageDistinct/GoodMohs scale hardness2-2.5LusterVitreous (Glassy)StreakWhiteDiaphaneityTransparentSpecific gravity2.505Density2.524Optical propertiesIsotropic, n=1.362.

Carobbiite, chemical formula KF (potassium fluoride), is a rare, soft (Mohs 2 - 2.5), colourless cubic mineral.[2] It is found at Monte Somma, Somma-Vesuvius Complex, Province of Naples, Campania, Italy. It was discovered in 1956 by Italian geologist Guido Carobbi (1900–1983).[3] It has also been reported from Hokkaido, Japan.[4]

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. ^ http://webmineral.com/data/Carobbiite.shtml Mineral data on Carobbiite
  3. ^ http://rruff.geo.arizona.edu/doclib/hom/carobbiite.pdf Mineral Handbook
  4. ^ http://www.mindat.org/min-908.html Mindat


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