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]
| Yttriaite-(Y) | |
|---|---|
| General | |
| Category | Oxide minerals |
| Formula (repeating unit) | Y2O3 |
| IMA symbol | Yt-Y[1] |
| 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 | [2] |
References
edit- ^ 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.
- ^ 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