Bearthite Mineral Data

General Bearthite Information
Chemical Formula:	Ca2Al(PO4)2(OH)
Composition:	Molecular Weight = 314.09 gm
	Calcium 25.52 % Ca 35.71 % CaO
	Aluminum 8.59 % Al 16.23 % Al₂O₃
	Phosphorus 19.72 % P 45.19 % P₂O₅
	Hydrogen 0.32 % H 2.87 % H₂O
	Oxygen 45.85 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Ca₂Al(PO₄)₂(OH)
Environment:	In synmetamorphic quartz segregations and as an accessory mineral in high-pressure metamorphic rocks. Experimental study indicates that the stability of bearthite is restricted to v ery Ca-poor or P-rich rocks under mode
IMA Status:	Approved IMA 1993
Locality:	Found on the western ridge of the Stockhorn, Zermatt Valley, Valais, Switzerland. Link to MinDat.org Location Data.
Name Origin:	Honors Professor Peter Bearth (1902-1989), for his pioneering petrologic studies of the high-pressure terranes of the western Alps.
Name Pronunciation:	Bearthite + Pronunciation
Synonym:	ICSD 74169
	IMA1986-050
	PDF 45-1483