Zajacite-(Ce) Mineral Data

General Zajacite-(Ce) Information
Chemical Formula:	Na(REExCa1-x)(REEyCa1-y)F6 where (x ne y)
Composition:	Molecular Weight = 295.08 gm
	Sodium 7.79 % Na 10.50 % Na₂O
	Calcium 16.98 % Ca 23.76 % CaO
	La,Ce,Pr,Nd,Sm, 36.60 % RE 42.70 % REE₂O₃
	Fluorine 38.63 % F 38.63 % F
	- % F -16.27 % -O=F₂
	______ ______
	100.00 % 99.32 % = TOTAL OXIDE
Empirical Formula:	NaREE_0.5Ca_0.5REE_0.25Ca_0.75F₆
Environment:	In a Precambrian perialkaline granitic complex.
IMA Status:	Approved IMA 1995
Locality:	The Strange Lake rare-earth-element deposit, about 250 km northeast of Schefferville, Quebec, on the Quebec-Labrador border, Canada. Link to MinDat.org Location Data.
Name Origin:	For Dr. Ihor Stephan Zajac (1935- ), the geologist who lead the exploration group that discovered the Strange Lake deposit and who first reconized the mineral.
Name Pronunciation:	Zajacite-(Ce)
Synonym:	IMA1993-038