Yttriaite-(Y)

Yttriaite-(Y)
General
CategoryOxide minerals
Formula
(repeating unit)		Y2O3
IMA symbolYt-Y[1]
Crystal systemIsometric
Unit cella = 10.6018 Å; Z = 16
Identification
ColorWhite
CleavageDistinct – good
FractureConchoidal
Mohs scale hardness5–6
LusterAdamantine
StreakWhite
Specific gravity5.073
Refractive indexn = 1.931
References[2]

Yttriaite-(Y) is an exceedingly rare mineral, a natural form of yttrium oxide, Y2O3.[3][2] In terms of chemistry it is yttrium-analogue of kangite, arsenolite, avicennite and senarmontite (isometric minerals).[4][5][6][7] Other minerals with the general formula A2O3 include corundum, bismite, bixbyite, eskolaite, hematite, karelianite, sphaerobismoite, tistarite, and valentinite.[8] Yttriaite-(Y) forms tiny inclusions in native tungsten.[3]

  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 Mindat
  3. ^ a b Mills, S.J., Kartashov, P.M., Ma, C., Rossman, G.R., Novgorodova, M.I., Kampf, A.R., and Raudsepp, M., 2011: Yttriaite-(Y): The natural occurrence of Y2O3 from the Bol’shaya Pol’ya River, Subpolar Urals, Russia. American Mineralogist 96(7), 1166–1170
  4. ^ Mindat, Kangite, http://www.mindat.org/min-42879.html
  5. ^ Mindat, Arsenolite, http://www.mindat.org/min-294.html
  6. ^ Mindat, Avicennite, http://www.mindat.org/min-437.html
  7. ^ Mindat, Senarmontite, http://www.mindat.org/min-3618.html
  8. ^ Mindat, Tistarite, http://www.mindat.org/min-38695.html