Yttriaite-(Y)
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]
| 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] |
References
- Mindat
- 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
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