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Norbergite is a nesosilicate mineral with formula Mg3(SiO4)(F,OH)2. It is a member of the humite group.

It was first described in 1926 for an occurrence in the Östanmoss iron mine in Norberg, Västmanland, Sweden, for which it is named.[2][3][5] It occurs in contact metamorphic zones in carbonate rocks intruded by plutonic rocks or pegmatites supplying the fluorine. Associated minerals include dolomite, calcite, tremolite, grossular, wollastonite, forsterite, monticellite, cuspidine, fluoborite, ludwigite, fluorite and phlogopite.[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. ^ a b Norbergite data on Webmineral
  3. ^ a b Norbergite on Mindat.org
  4. ^ a b “Norbergite in the Handbook of Mineralogy” (PDF). Archived from the original (PDF) on 2012-07-16. Retrieved 2014-01-25.
  5. ^ “Norbergite”. merriam-webster.com. Merriam-Webster. Retrieved 15 September 2013.