Yttriaite-(Y)
Appearance
Yttriaite-(Y) | |
---|---|
General | |
Category | Oxide minerals |
Formula (repeating unit) | Y2O3 |
Crystal system | Isometric |
Unit cell | a = 10.6018 Å; Z = 16 |
Identification | |
Color | White |
Cleavage | Distinct - good |
Fracture | Conchoidal |
Mohs scale hardness | 5 - 6 |
Luster | Adamantine |
Streak | White |
Specific gravity | 5.073 |
Refractive index | n = 1.931 |
References | [1] |
Yttriaite-(Y) is an exceedingly rare mineral, a natural form of yttrium oxide, Y2O3.[2][1] In terms of chemistry it is yttrium-analogue of kangite, arsenolite, avicennite and senarmontite (isometric minerals).[3][4][5][6] Other minerals with the general formula A2O3 include corundum, bismite, bixbyite, eskolaite, hematite, karelianite, sphaerobismoite, tistarite, and valentinite.[7] Yttriaite-(Y) forms tiny inclusions in native tungsten.[2]
References
- ^ a b Mindat
- ^ 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
- ^ Mindat, Kangite, http://www.mindat.org/min-42879.html
- ^ Mindat, Arsenolite, http://www.mindat.org/min-294.html
- ^ Mindat, Avicennite, http://www.mindat.org/min-437.html
- ^ Mindat, Senarmontite, http://www.mindat.org/min-3618.html
- ^ Mindat, Tistarite, http://www.mindat.org/min-38695.html