Ussingite

Ussingite
Ussingite from Shkatulka pegmatite, Umbozero mine (Umbozerskii mine), Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General
CategoryPhyllosilicate minerals
Formula
(repeating unit)		Na2AlSi3O8OH
IMA symbolUsg[1]
Strunz classification9.EH.20
Crystal systemTriclinic
Crystal classPinacoidal (1)
(same H-M symbol)
Space groupP1
Identification
Colorpale to medium violet, reddish violet; sometimes barely tinted purple
Fractureirregular/ uneven
Tenacitybrittle
Mohs scale hardness6–7
Lustersub-vitreous
Streakwhite
Diaphaneitytransparent, translucent
References[2][3]

Ussingite is a silicate mineral with formula Na2AlSi3O8(OH).[4]

It was named for Niels Viggo Ussing (1864–1911), Copenhagen, Denmark.

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. ^ Mindat.org Mindat
  3. ^ Webmineral.com Webmineral data
  4. ^ Handbook of Mineralogy (HOM – MSA) – Ussingite


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