Wakefieldite-(La)
| Wakefieldite-(La) | |
|---|---|
_,_Hausmannite_-_Grube_Gl%C3%BCcksstern,_Gottlob,_Th%C3%BCringen.jpg) Wakefieldite-(La) on hausmannite | |
| General | |
| Category | Rare-earth mineral |
| Formula (repeating unit) | (LaVO4) |
| IMA symbol | Wf-La[1] |
| Strunz classification | 8.AD.35 |
| Dana classification | 38.4.9.6 |
| Crystal system | Tetragonal |
| Crystal class | Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) |
| Space group | I41/amd |
| Identification | |
| Color | Light pink, brown |
| Crystal habit | Prismatic crystals |
| Cleavage | None Observed, possible {100} |
| Fracture | Irregular |
| Tenacity | brittle |
| Mohs scale hardness | 4 |
| Luster | Adamantine |
| Streak | white |
| Diaphaneity | Transparent, Translucent |
| Specific gravity | 4.703 (calculated) |
| Optical properties | Uniaxial (+) |
| References | [2] |
Wakefieldite-(La) is the lanthanum endpoint of Wakefieldite with the ideal formula LaVO4. As a vanadate in the tetragonal crystal system, the rare-earth mineral is a member of the xenotime group.
Wakefieldite-(La) was first described in 2008 for an occurrence in the Glücksstern mine, Gottlob Hill, Friedrichroda, Thuringia, Germany.[3] Similar to other rare-earth minerals, the type material contained considerable parts of other rare earth elements, namely neodymium, praseodymium, samarium and yttrium.[4]
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.
- ^ "Wakefieldite-(La)". Mindat.org. Retrieved 2 August 2022.
- ^ Webmineral data, Wakefieldite-(La).
- ^ Witzke T, Kolitsch U, Warnsloh JM, Göske J (2008-12-15). "Wakefieldite-(La), LaVO4 , a new mineral species from the Glucksstern Mine, Friedrichroda, Thuringia, Germany". European Journal of Mineralogy. 20 (6): 1135–1139. doi:10.1127/0935-1221/2009/0021-1875. Retrieved 2025-01-05.
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