Cadwaladerite
(repeating unit)AlCl(OH)2·4(H2O) IMA symbol Cwd[1] Strunz classification 3.BD.05 Crystal system amorphous Identification Formula mass 168.51 g/mol Color Lemon yellow Fracture Conchoidal Luster Vitreous Diaphaneity transparent Specific gravity 1.66 Optical properties Isotropic Refractive index n = 1.513, variable Other characteristics deliquescent References [2][3][4][5]
Cadwaladerite is a rare aluminium halide mineral with formula: AlCl(OH)2·4(H2O). It was reported for an amorphous substance associated with sulfate minerals and embedded in a halite crystal cluster. Its status is uncertain due to inadequate data.[3][4][5] It was first described in 1941 for an occurrence in mine dumps of the Victoria Segunda mine Cerros Pintados, Iquique province, Tarapacá Region, Chile.[4] It was named for Charles Meigs Biddle Cadwalader, president of the Academy of Natural Sciences.[5] Lesukite was discredited (IMA2018-H).
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.
- ^ Mineralienatlas
- ^ a b Cadwaladerite Mineral Data - Webmineral
- ^ a b c Cadwaladerite mineral information and data - Mindat.org
- ^ a b c Handbook of Mineralogy
- v
- t
- e