Brockite Mineral Data

General Brockite Information
Chemical Formula:	(Ca,Th,Ce)(PO4)•(H2O)
Composition:	Molecular Weight = 220.66 gm
	Calcium 10.90 % Ca 15.25 % CaO
	Cerium 6.35 % Ce 7.44 % Ce₂O₃
	Thorium 31.55 % Th 35.90 % ThO₂
	Phosphorus 14.04 % P 32.16 % P₂O₅
	Hydrogen 0.91 % H 8.16 % H₂O
	Oxygen 36.25 % O
	______ ______
	100.00 % 98.91 % = TOTAL OXIDE
Empirical Formula:	Ca_0.6Th_0.3Ce_0.1(PO₄)•(H₂O)
Environment:	A rare accessory mineral in granite and granite pegmatites.
IMA Status:	Approved IMA 1962
Locality:	In the USA, in a prospect pit about one km east of the Bassick mine, Querida, Wet Mountains, and at the Hardwick mine and Nightingale shaft, Custer Co., Colorado. Link to MinDat.org Location Data.
Name Origin:	To honor Maurice R. Brock, U.S. Geological Survey, who supplied the first specimen.
Name Pronunciation:	Brockite
Synonym:	Silicosmirnovskite
	Smirnovskite