Cejkaite Mineral Data

General Cejkaite Information
Chemical Formula:	Na4(UO2)(CO3)3
Composition:	Molecular Weight = 546.35 gm
	Sodium 15.86 % Na 21.38 % Na₂O
	Magnesium 0.09 % Mg 0.15 % MgO
	Uranium 44.87 % U 50.91 % UO₂
	Iron 0.41 % Fe 0.53 % FeO
	Carbon 6.55 % C 24.00 % CO₂
	Oxygen 32.21 % O
	______ ______
	100.00 % 96.97 % = TOTAL OXIDE
Empirical Formula:	Na_3.77Mg_0.02Fe²⁺_0.04(UO₂)_1.03(CO₃)_2.98
Environment:	Secondary mineral associated with decomposed uraninite. Formed in a relatively dry environment in a restricted pH (6.5-11.5, non-acidic) range. Related to grimselite.
IMA Status:	Approved IMA 2003 (Dana # Added)
Locality:	Jachymov, NW Bohemia, Czech Republic. Link to MinDat.org Location Data.
Name Origin:	Named for Jiri Cejak (1929-) for his numerous contributions to the crystal chemistry of U minerals.
Synonym:	IMA1999-045