Pyrophosphite Mineral Data

General Pyrophosphite Information
Chemical Formula:	K2CaP2O7
Composition:	Molecular Weight = 287.36 gm
	Potassium 24.35 % K 29.34 % K₂O
	Sodium 0.80 % Na 1.08 % Na₂O
	Calcium 13.81 % Ca 19.32 % CaO
	Magnesium 0.51 % Mg 0.84 % MgO
	Phosphorus 21.56 % P 49.40 % P₂O₅
	Oxygen 38.97 % O
	______ ______
	100.00 % 99.97 % = TOTAL OXIDE
Empirical Formula:	K_1.79Na_0.1Ca_0.99Mg_0.06P₂O₇
Environment:	Arnhemite and pyrophosphite are the principal phases in a slag that forms a thin layer in a profile of cave soil. The slag is interpreted to have resulted from the melting of ashes during the combustion of bat quano.
IMA Status:	Not Approved IMA
Locality:	Arhem Cave, 150 km east of Windhoek, Namibia. Link to MinDat.org Location Data.
Name Origin:	Named after the Greek pyros, meaning fire and the element name - Phosphorus.