AEGIRINE
AEGIRINE Aegirine is an inosilicate of the Pyroxene Supergroup. It is an uncommon mineral, whose occurrence is restricted to some types of rocks. It has no economic importance. Aegirine forms a solid solution with augite. The middle term is aegirine-augite. “Acmite” was a term used for both green and brown aegirines with pointed ends; the […]
ACANTHITE
ACANTHITE Acanthite – Ag2S – is a rarer sulfide typical of hydrothermal veins. It is the most important silver ore after argentiferous galena. Acanthite and argentite are polymorphs. Silver sulfide can form at more than 177ºC (literature diverges: 173ºC, 179ºC, 180ºC) with cubic structure or below this temperature with monoclinic structure. The mineral with a […]