Dyrnaesite-(La) Explained

Dyrnaesite-(La)
Category:	Phosphate mineral
Imasymbol:	Dyr-La^[1]
System:	Orthorhombic
Class:	Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Symmetry:	Pnma
Unit Cell:	a = 18.466, b = 16.011 c = 7.027 [Å] (approximated) Z = 4
References:	^[2] ^[3]

Dyrnaesite-(La) is a rare-earth phosphate mineral with the formula . 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.^{[4] [5]}

Notes and References

1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3. 291–320. 10.1180/mgm.2021.43. 2021MinM...85..291W. 235729616. free.
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. Web site: Dyrnaesite-(La): Dyrnaesite-(La) mineral information and data . Mindat.org . 2016-03-04.
4. Web site: Cerianite-(Ce): Cerianite-(Ce) mineral information and data . Mindat.org . 2016-03-08.
5. Web site: Stetindite - Stetindite mineral information and data . Mindat.org . 2016-03-08.