Bobdownsite Mineral Data

General Bobdownsite Information
Chemical Formula:	Ca9Mg(PO3F)(PO4)6
Composition:	Molecular Weight = 1,054.36 gm
	Sodium 0.52 % Na 0.71 % Na₂O
	Calcium 33.30 % Ca 46.59 % CaO
	Magnesium 1.66 % Mg 2.75 % MgO
	Aluminum 0.28 % Al 0.53 % Al₂O₃
	Iron 0.90 % Fe 0.27 % FeO / 0.98 % Fe₂O₃
	Phosphorus 20.56 % P 47.12 % P₂O₅
	Oxygen 40.97 % O
	Fluorine 1.80 % F 1.80 % F
	- % F -0.76 % -O=F₂
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Ca_8.76Na_0.24Mg_0.72Fe³⁺_0.13Al_0.11Fe²⁺_0.04(PO₃)F(PO₄)₆
Environment:	Whitlockite group
IMA Status:	Approved IMA 2008 (Dana # Added)
Locality:	Big Fish River, Yukon Territory, Canada Link to MinDat.org Location Data.
Name Origin:	Named for Robert (Bob) Terrance Downs, Professor of Geophysics, University of Arizona, and chief advisor for the RRUFF project to collect Raman spectra of all minerals.
Synonym:	IMA2008-037