Dyrnaesite-(La)
| 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 recently described 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.[3][4]
References
- 1 2 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
- 1 2 "Dyrnaesite-(La): Dyrnaesite-(La) mineral information and data". Mindat.org. Retrieved 2016-03-04.
- ↑ "Cerianite-(Ce): Cerianite-(Ce) mineral information and data". Mindat.org. Retrieved 2016-03-08.
- ↑ "Stetindite - Stetindite mineral information and data". Mindat.org. Retrieved 2016-03-08.
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