oxyhydroxy-halide

Oxyhydroxy-halides are a rare category of halide minerals, often formed when halide-bearing waters interact with the oxidized products of sulfides. These compounds are typically insoluble. Examples include atacamite, matlockite, and nadorite. Halide minerals, in general, are naturally occurring inorganic compounds that are salts of halogen acids, such as hydrochloric acid. While some halides like halite (rock salt) and fluorite are common, many others are found only in localized occurrences. Minerals are classified based on their dominant anion or anionic group, with halides being one such group characterized by large halogen anions like chlorine, bromine, iodine, and fluorine.12