ADAMITE on LIMONITE, MINA OJUELA, MAPIMI, MUN. DE MAPIMI, DURANGO, MEXICO (large cabinet)

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Adamite is a mineral composed of zinc arsenate hydroxide, with the chemical formula Zn2AsO4OH. It is commonly found in the oxidized or weathered areas above zinc ore deposits. Whil e pure adamite is colorless, it often appears yellow due to the presence of iron compounds. Additionally, green hues can be observed, which are attributed to copper substitutions within its structure. Limonite is an iron ore made up of a blend of hydrated iron(III) oxide-hydroxides with varying compositions. While it is often represented by the formula FeO(OH)·nH2O, this depiction is somewhat misleading since the proportions of oxide to hydroxide can differ significantly. Show more