Chemistry:Dyrnaesite-(La)
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Short description: Rare earth phosphate mineral
| Dyrnaesite-(La) | |
|---|---|
| General | |
| Category | Phosphate mineral |
| Formula (repeating unit) | Na8Ce4+(La,REE)2(PO4)6 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pnma |
| Unit cell | a = 18.466, b = 16.011 c = 7.027 [Å] (approximated) Z = 4 |
| Identification | |
| References | [1][2] |
Dyrnaesite-(La) is a rare-earth phosphate mineral with the formula Na8Ce4+(La,REE)2(PO4)6. Dyrnaesite-(La) is related to vitusite-(Ce), another rare-earth phosphate mineral.[1][2] It comes from lujavrite, a type of alkaline syenite rock, of South Greenland. Dyrnaesite-(La) is one of few known minerals with essential tetravalent cerium, the other two being cerianite-(Ce) and stetindite.[4][5]
References
- ↑ 1.0 1.1 Rønsbo, J. G., Balić-Žunić, T., and Petersen, O. V., 2015. Dyrnaesite-(La), IMA 2014-070. CNMNC Newsletter No. 23, February 2015, page 54; Mineralogical Magazine, 79, 51–58.
- ↑ 2.0 2.1 "Dyrnaesite-(La): Dyrnaesite-(La) mineral information and data". http://www.mindat.org/min-46510.html. Retrieved 2016-03-04.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
- ↑ "Cerianite-(Ce): Cerianite-(Ce) mineral information and data". http://www.mindat.org/min-929.html. Retrieved 2016-03-08.
- ↑ "Stetindite - Stetindite mineral information and data". http://www.mindat.org/min-38899.html. Retrieved 2016-03-08.
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