Cabalzarite
(repeating unit)Ca(Mg,Al,Fe3+
)
2[AsO
4]
2•2(H
2O,OH) IMA symbol Clz[1] Strunz classification 8.CG.15 Crystal system Monoclinic Crystal class Prismatic (2/m)
(same H-M symbol) Space group C2/m Unit cell a = 8.925 Å,
b = 6.143 Å,
c = 7.352 Å,
β = 115.25°; Z = 2 Identification Color Light brown, brownish pink, orange brown Crystal habit Aggregates and clusters, granular Fracture Irregular Mohs scale hardness 5 Luster Vitreous Streak White Diaphaneity transparent Specific gravity 3.89 Optical properties Biaxial Refractive index nα = 1.700 nγ = 1.760 Birefringence δ = 0.060 References [2][3][4] 
)
2[AsO
4]
2•2(H
2O,OH)
(same H-M symbol)
b = 6.143 Å,
c = 7.352 Å,
β = 115.25°; Z = 2
Cabalzarite is a rare arsenate mineral with the chemical formula Ca(Mg,Al,Fe3+
)
2[AsO
4]
2•2(H
2O,OH). It is a member of the tsumcorite group. It crystallizes in the monoclinic system and typically occurs as clusters of crystals or granular aggregates.[2][3]
It was first described for samples from an abandoned manganese mine in Falotta, Graubünden, Switzerland and named for Swiss amateur mineralogist Walter Cabalzar. It was approved as a new mineral by the IMA in 1997. It has also been reported from the Aghbar mine in Ouarzazate Province, Morocco.[3]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Cabalzarite mineral data from Webmineral
- ^ a b c Cabalzarite mineral information on Mindat.org
- ^ Brugger J., Meisser N., Schenk K., Berlepsch P., Bonin M., Armbruster T., Nyfeler D. and Schmidt S. 2000: Description and crystal structure of cabalzarite Ca(Mg,Fe,Al)2(AsO4)2(H2O,OH)2, a new mineral from the tsumcorite group. American Mineralogist, 85(9), 1307-1314; [1]
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