Ercitite Mineral Data

General Ercitite Information
Chemical Formula:	Na2(H2O)4[Mn+++2(OH)2(PO4)2]
Composition:	Molecular Weight = 225.83 gm
	Sodium 9.06 % Na 12.21 % Na₂O
	Calcium 0.71 % Ca 0.99 % CaO
	Manganese 12.89 % Mn 18.53 % Mn₂O₃
	Iron 11.38 % Fe 16.26 % Fe₂O₃
	Phosphorus 13.85 % P 31.74 % P₂O₅
	Hydrogen 2.23 % H 19.94 % H₂O
	Oxygen 49.88 % O
	______ ______
	100.00 % 99.68 % = TOTAL OXIDE
Empirical Formula:	Na_0.89Ca_0.04Mn³⁺_0.53Fe³⁺_0.46(PO₄)_1.01(OH)•2(H₂O)
Environment:	Strongly oxidizing, low-temperature hydrothermal alteration. Found as an overgrowth on collinsite, fairfieldite, whitlockite, and other phosphates on a fracture surface the cuts an altered nodule of lithophllite.
IMA Status:	Approved IMA 1999 (Dana # Added)
Locality:	Tanco pegmatite at Bernic Lake, southeastern Maitoba, Canada. Link to MinDat.org Location Data.
Name Origin:	Named for mineralogist T. Scott Ercit (1957-) of the Canadian Museum of Nature, Ottawa, Canada.
Synonym:	IMA1999-036