Cadwaladerite

Cadwaladerite
General
Category Halide mineral
Formula
(repeating unit)		 AlCl(OH)2·4(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: 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.[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

  1. ↑ Mineralienatlas
  2. 1 2 Cadwaladerite Mineral Data - Webmineral
  3. 1 2 3 Cadwaladerite mineral information and data - Mindat.org
  4. 1 2 3 Handbook of Mineralogy


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