Yellow microcrystals and masses of the very rare aluminium chloride-hydroxide mineral Cadwaladerite from only one the three known localities worldwide: Maria Mine, Caleta Vítor District, Arica & Parinacota Region, Chile.
General
Category
Halide mineral
Formula (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).
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...
Melbourne, Australia Creswell railway station, Derbyshire, England Cadwaladerite, an aluminium halide mineral Canada's Worst Driver, a television series...
chloraluminite. A more complex, basic and hydrated aluminium chloride mineral is cadwaladerite. Anhydrous AlCl3 reacts vigorously with bases, so suitable precautions...
Inlet, Antarctica Cadwalader Park, Trenton, New Jersey, United States Cadwaladerite, a mineral Cadwalader family, 18–19th century American family Cadwaladr...