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Halide

Cadwaladerite

Al₂(H₂O)(OH)₄·n(Cl,OH⁻,H₂O)
ClassHalide
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Cadwaladerite specimen

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. — Photo: David Hospital · CC BY-SA 4.0

Cadwaladerite

A rare aluminium oxychloride hydrate reported from sulfate minerals embedded in a halite cluster.

Intro adapted from Wikipedia (CC BY-SA).

Cadwaladerite is an IMA-recognized mineral species in the halide class, with the chemical formula Al₂(H₂O)(OH)₄·n(Cl,OH⁻,H₂O).

Key properties: specific gravity 1.66; Vitreous luster.

IMA symbol Cwd, IMA status: approved, named in 1941.

Found in a sulfate deposit, embedded in halite.

It is found associated with Halite, gypsum.

The name refers to Charles Meigs Biddle Cadwalader, formerly President of the Academy of Natural Sciences, Philadelphia, Pennsylvania, USA.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet. Browse more C minerals or help write this entry.