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Dyrnaesite-(La)

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Rare earth phosphate mineral
Dyrnaesite-(La)
General
CategoryPhosphate mineral
Formula
(repeating unit)		Na
8Ce
(La,REE)
2(PO
4)
6
IMA symbolDyr-La
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPnma
Unit cella = 18.466, b = 16.011
c = 7.027  (approximated)
Z = 4
Identification
References

Dyrnaesite-(La) is a rare-earth phosphate mineral with the formula Na
8Ce
(La,REE)
2(PO
4)
6. Dyrnaesite-(La) is related to vitusite-(Ce), another rare-earth phosphate mineral. 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.

References

  1. 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.
  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.
  3. ^ "Dyrnaesite-(La): Dyrnaesite-(La) mineral information and data". Mindat.org. Retrieved 2016-03-04.
  4. "Cerianite-(Ce): Cerianite-(Ce) mineral information and data". Mindat.org. Retrieved 2016-03-08.
  5. "Stetindite - Stetindite mineral information and data". Mindat.org. Retrieved 2016-03-08.
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