Akantit

Acanthite is a form of silver sulfide with the chemical formula Ag2S. It crystallizes in the monoclinic system and is the stable form of silver sulfide below . Argentite is the stable form above that temperature. As argentite cools below that temperature its cubic form is distorted to the monoclinic form of acanthite. Below 173 °C acanthite forms directly. Acanthite is the only stable form in normal air temperature.

In the Vinony graph

Vinony's link graph records 80 inbound references to Akantit, and connects out to iron, silver and copper.

It sits within the topics Glances, Minerals described in 1855 and Minerals in space group 14.

Vinony links it to 35 Wikipedia language editions.

Key facts

Mineral.name: Acanthite
Mineral.category: Sulfide mineral
Mineral.image: Acanthite - Imiter mine, Jbel Saghro, Tinghir, Drâa-Tafilalet, Morocco.jpg
Mineral.imagesize: 280px
Mineral.caption: Crystallized acanthite (4.0 × 2.5 × 1.5 cm) from Imiter mine, Jbel Saghro mountain range, Morocco
Mineral.formula: Ag2S
Mineral.IMAsymbol: Aca
Mineral.strunz: 2.BA.30a
Mineral.system: Monoclinic
Mineral.class: Prismatic (2/m) (same H-M symbol)
Mineral.symmetry: P21/n
Mineral.unit cell: a = 4.229 Å, b = 6.931 Å c = 7.862 Å; β = 99.61°; Z = 4
Mineral.color: Iron-black
Mineral.habit: Primary crystals rare, prismatic to long prismatic, elongated along [001], may be tubular; massive. Commonly paramorphic after the cubic high-temperature phase ("argentite"), of original cubic or octahedral habit
Mineral.twinning: Polysynthetic on {111}, may be very complex due to inversion; contact on {101}
Mineral.cleavage: Indistinct
Mineral.fracture: Uneven
Mineral.tenacity: Sectile

via Wikipedia infobox

Wikidata facts

Subclass of: sulfide class of minerals
Named after: spinose structure
Image: Acanthite - Imiter mine, Jbel Saghro, Tinghir, Drâa-Tafilalet, Morocco.jpg

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