Petewilliamsite Mineral Data

General Petewilliamsite Information
Chemical Formula:	(Ni,Co,Cu)30(As2O7)15
Composition:	Molecular Weight = 5,730.36 gm
	Calcium 0.12 % Ca 0.17 % CaO
	Iron 0.03 % Fe 0.04 % FeO
	Cobalt 14.21 % Co 18.07 % CoO
	Copper 2.67 % Cu 3.35 % CuO
	Nickel 15.01 % Ni 19.11 % NiO
	Arsenic 38.64 % As 59.26 % As₂O₅
	Oxygen 29.32 % O
	______ ______
	100.00 % 99.99 % = TOTAL OXIDE
Empirical Formula:	Ni_14.66Co_13.82Cu_2.41Ca_0.17Fe²⁺_0.0315(As_1.97)15(O₇)
Environment:	In a fine-grained quartz specimen. It is the only known natural pyroarsenate.
IMA Status:	Approved IMA 2004 (Dana # Added)
Locality:	Johanngeorgenstadt, Saxony, Germany. Link to MinDat.org Location Data.
Name Origin:	Named for Peter (Pete) Allan Williams (b. 1950), Professor, Minerals and Materials Group, School of Science, Food and Horticulture, University of Western Sydney, Penrith South DC, N ew South Wales, Australia.
Synonym:	IMA2002-059