Cadwaladerite

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Cadwaladerite
General
Category Halide mineral
Formula
(repeating unit)
Al(OH)Cl2·4(H2O)
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 [1][2][3][4]

Cadwaladerite is a rare aluminium halide mineral with formula: AlOHCl2·4(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.[2][3][4]

It was first described in 1941 for an occurrence in mine dumps of the Victoria Segunda mine Cerros Pintados, Iquique province, Tarapacá Region, Chile.[3] It was named for Charles Meigs Biddle Cadwalader, president of the Academy of Natural Sciences.[4]

References[edit]