| Cabalzarite | |
|---|---|
 Cabalzarite found in Switzerland | |
| General | |
| Category | Arsenate minerals |
| Formula (repeating unit) | Ca(Mg,Al,Fe ) 2 2•2(H 2O,OH) |
| IMA symbol | Clz |
| 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 | |
Cabalzarite is a rare arsenate mineral with the chemical formula Ca(Mg,Al,Fe
)
2
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.
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.
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.
- ^ Cabalzarite mineral data from Webmineral
- ^ 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;
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