Althausite

Althausite
	Dark reddish brown, subhedral crystals of althausite in a serpentine-talc matrix with dark gray subhedral hematite crystals and greenish lizardite
General
Category	Phosphate minerals
Formula; (repeating unit)	Mg2(PO4)(OH,F)
Strunz classification	8.BB.25
Crystal system	Orthorhombic
Crystal class	Dipyramidal (mmm) ; H-M symbol: (2/m 2/m 2/m)
Space group	Pnma
Identification
References	[1][2][3]

Althausite is a relatively simple magnesium phosphate mineral with formula Mg₂(PO₄)(OH,F). It is very rare. Original occurrences are magnesite deposits among serpentinites. It is named after Egon Althaus (born 1933), a mineralogist at the University of Karlsruhe, Germany.[4][2][5]

References

Mindat
Webmineral data
Raade G. and Tysseland M. 1975: Althausite, a new mineral from Modum, Norway. Lithos, 8, 215-219
http://www.handbookofmineralogy.org/pdfs/althausite.pdf Handbook of Mineralogy

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[Mindat-2] Mindat

[Webmin-3] Webmineral data

[4] Raade G. and Tysseland M. 1975: Althausite, a new mineral from Modum, Norway. Lithos, 8, 215-219

[5] ttp://www.handbookofmineralogy.org/pdfs/althausite.pdf Handbook of Mineralogy