Gatehouseite Mineral Data

General Gatehouseite Information
Chemical Formula:	Mn++5(PO4)2(OH)4
Composition:	Molecular Weight = 532.66 gm
	Manganese 51.57 % Mn 66.59 % MnO
	Phosphorus 11.63 % P 26.65 % P₂O₅
	Hydrogen 0.76 % H 6.76 % H₂O
	Oxygen 36.04 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Mn²⁺₅(PO₄)₂(OH)₄
Environment:	Secondary mineral in cavities in a sedimentary Fe�Mn deposit, probably formed by reaction of phosphorus-rich fluids with hausmannite at low temperature.
IMA Status:	Approved IMA 1993
Locality:	Iron Monarch quarry, Iron Knob, South Australia. Link to MinDat.org Location Data.
Name Origin:	Named for Bryan Michael Kenneth Cummings Gatehouse (1932- ), crystal chemist, Monash University, Melbourne, Australia.
Name Pronunciation:	Gatehouseite + Pronunciation
Synonym:	ICSD 1198
	IMA1992-016
	PDF 47-1822