Talk:Acanthite

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Hello! This is to let editors know that File:Acanthite -_Imiter_mine,_Jbel_Saghro,_Tinghir,_Drâa-Tafilalet,_Morocco.jpg, a featured picture used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for March 18, 2024. A preview of the POTD is displayed below and can be edited at Template:POTD/2024-03-18. For the greater benefit of readers, any potential improvements or maintenance that could benefit the quality of this article should be done before its scheduled appearance on the Main Page. If you have any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you! — Amakuru (talk) 14:00, 14 March 2024 (UTC)[reply]

Acanthite is a form of silver sulfide with the chemical formula Ag₂S. It was first described in 1855 for an occurrence in the Ore Mountains in the present-day Czech Republic. The name is derived from the Greek "akantha" meaning thorn or arrow, in reference to its crystal shape. Acanthite crystallizes in the monoclinic system and is the stable form of silver sulfide below 173 °C (343 °F). As argentite cools below that temperature, its cubic form is distorted to the monoclinic form of acanthite. This crystal of acanthite, with dimensions of 4.0 cm × 2.5 cm × 1.5 cm (1.57 in × 0.98 in × 0.59 in), was extracted from a mine in Imider, in the Jbel Saghro, a mountain range in Morocco. This photograph has been focus-stacked from 42 separate images.

Photograph credit: Ivar Leidus

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