canfieldite
Sign in to saveCanfieldite is a rare silver tin sulfide mineral with formula: Ag8SnS6. The mineral typically contains variable amounts of germanium substitution in the tin site and tellurium in the sulfur site. There is a complete series between canfieldite and its germanium analogue, argyrodite. It forms black orthorhombic crystals which often appear to be cubic in form due to twinning. The most typical form is as botryoidal rounded grape-like masses. Its Mohs hardness is 2.5 and the specific gravity is 6.28. Canfieldite exhibits conchoidal fracturing and no cleavage.
Key facts
- Mineral.name
- Canfieldite
- Mineral.image
- Canfieldite-21373.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Canfieldite
- Mineral.category
- Sulfide minerals
- Mineral.formula
- Ag8SnS6
- Mineral.IMAsymbol
- Cfi
- Mineral.strunz
- 2.BA.70
- Mineral.system
- Orthorhombic
- Mineral.class
- Pyramidal (mm2) (same H-M symbol)
- Mineral.symmetry
- Pna21
- Mineral.color
- Steel gray with reddish tint
- Mineral.fracture
- Irregular/ uneven, conchoidal
- Mineral.tenacity
- Brittle
- Mineral.luster
- Metallic
- Mineral.streak
- Greyish black
- Mineral.diaphaneity
- Opaque
- Mineral.density
- 6.2 – 6.3 g/cm3
via Wikipedia infobox
Wikidata facts
- Image
- Canfieldite-21373.jpg
Show 6 more facts
- chemical formula
- Ag₈SnS₆
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.BA.70
- Nickel-Strunz 9th edition (updated 2009)
- 2.BA.35
- Commons category
- Canfieldite
- IMA Mineral Symbol
- Cfi
- Strunz 8th edition (series ID, updated)
- II/A.03 – Anhang
via Wikidata · CC0
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Article
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- See also
- References
Canfieldite is a rare silver tin sulfide mineral with formula: Ag8SnS6. The mineral typically contains variable amounts of germanium substitution in the tin site and tellurium in the sulfur site. There is a complete series between canfieldite and its germanium analogue, argyrodite. It forms black orthorhombic crystals which often appear to be cubic in form due to twinning. The most typical form is as botryoidal rounded grape-like masses. Its Mohs hardness is 2.5 and the specific gravity is 6.28. Canfieldite exhibits conchoidal fracturing and no cleavage.
Canfieldite was first described in 1893 from an occurrence in Colquechaca, Potosí Department, Bolivia. It was named for Frederick Alexander Canfield (1849–1926), an American mining engineer.
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