By Chisom Ibemere
Acanthite is a form of silver sulfide. It crystallizes in the monoclinic system and is the stable form of silver sulfide below 173 °C (343 °F). Argentite is the stable form above that 173 °C. As argentite cools below that temperature its cubic form is distorted to the monoclinic form of acanthite.
Acanthite forms in hydrothermal veins with other minerals, which includes silver, galene, pyrargyrite, and proustite. It also paperwork as a secondary alteration made from number one silver sulfides. when heated, acanthite fuses quite simply and releases sulfurous fumes.
The maximum famous locality of acanthite, the Comstock Lode in Nevada, united states of america, turned into so wealthy in silver that a department of the usa mint was established at close by Carson city to coin its output.
Acanthite is a common silver mineral in moderately low-temperature hydrothermal veins and in zones of supergene enrichment.
Acanthite occurs in association with native silver, pyrargyrite, proustite, polybasite, stephanite, aguilarite, galena, chalcopyrite, sphalerite, calcite and quartz.
Occurrence of Acanthite
Argentite is an critical primary silver mineral found in veins related to local silver, the ruby silvers, polybasite, stephanite, galena, and sphalerite. it could also be of secondary starting place. it’s miles located in microscopic inclusions in so-called argentiferous galena.
Acanthite has a grey, black colour. It has a hardness of 2-2.5 with a monoclinic crystal system.
Acanthite can be found in association with other minerals such as Silver, pyrargyrite, proustite, polybasite, stephanite, aguilarite, galena, chalcopyrite, sphalerite, calcite, quartz.
