Cadwaladerite

Cadwaladerite
General
Category Halide mineral
Formula
(repeating unit)		 Al(OH)Cl2·4(H2O)
Strunz classification 03.BD.05
Identification
Formula mass 168.51 gm
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]

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.[1][2][3]

It was first described in 1941 for an occurrence in mine dumps of the Victoria Segunda mine Cerros Pintados, Iquique province, Tarapacá Region, Chile.[2] It was named for Charles Meigs Biddle Cadwalader, president of the Academy of Natural Sciences.[3]

References

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


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