Fontarnauite

Fontarnauite
Fontarnauite
	Fontarnauite, Anatolia, West Turkey
General
Category	Borate minerals
Formula; (repeating unit)	(Na,K)2(Sr,Ca)(SO4)[B5O8(OH)]·2H2O
Strunz classification	6.DA.60
Crystal system	Monoclinic
Crystal class	Prismatic (2/m) ; (same H-M symbol)
Space group	P21/c
Identification
Color	Light brown
Cleavage	Perfect {010}
Mohs scale hardness	2.5 - 3
References

Fontarnauite is a relatively recently described, rare sulfate, borate mineral with the formula (Na,K)₂(Sr,Ca)(SO₄)[B₅O₈(OH)]·2H₂O. It is found in an evaporite boron deposit. It coexists with other evaporite boron minerals, especially probertite. It is monoclinic, crystallizing in the space group P2₁/c.^[3]^[1]

It was named for Ramon Fontarnau i Griera, a materials scientist of the University of Barcelona.^[1]

References

^ ^a ^b ^c Mindat
^ Mineralienatlas
^ García-Veigas, J., Rosell, L., Alcobé, X., Subias, I., Ortí, F., Gündoğan, İ., and Helvaci, C., 2010. Fontarnauite, a New Sulphate-Borate Mineral from the Emet Borate District (Turkey). Revista de la Sociedad Española de Mineralogía 13, 97-98

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[mindat-1] Mindat

[atlas-2] Mineralienatlas

[3] García-Veigas, J., Rosell, L., Alcobé, X., Subias, I., Ortí, F., Gündoğan, İ., and Helvaci, C., 2010. Fontarnauite, a New Sulphate-Borate Mineral from the Emet Borate District (Turkey). Revista de la Sociedad Española de Mineralogía 13, 97-98

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