gersdorffite
Sign in to saveAlso known as gersdorffite-P2₁3
Gersdorffite or Nickel glance (trivial name) is a nickel arsenic sulfide mineral with formula NiAsS. It crystallizes in the isometric system showing diploidal symmetry. It occurs as euhedral to massive opaque, metallic grey-black to silver white forms. Gersdorffite belongs to a solid solution series with cobaltite, CoAsS. Antimony freely substitutes also leading to ullmannite, NiSbS. It has a Mohs hardness of 5.5 and a specific gravity of 5.9 to 6.33.
Key facts
- Mineral.name
- Gersdorffite
- Mineral.image
- Gersdorffit - Lobenstein, Vogtland.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Gersdorffite
- Mineral.formula
- NiAsS
- Mineral.strunz
- 2.EB.25
- Mineral.system
- P213 polytype: cubic Pa3 polytype: cubic Pca21 polytype: orthorhombic
- Mineral.color
- silver white to steel gray
- Mineral.mohs
- 5–5.5
- Mineral.streak
- grayish black
- Mineral.gravity
- 5.6–6.2
via Wikipedia infobox
Wikidata facts
- Image
- Gersdorffite.jpg
Show 8 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 2.EB.25
- Commons category
- Gersdorffite
- chemical formula
- NiAsS
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.EB.25
- Mohs' hardness
- 5.5
- density
- 5.9
- Strunz 8th edition (series ID, updated)
- II/C.06a
- IMA Mineral Symbol
- Gdf
Sources (2)
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Article
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Gersdorffite or Nickel glance (trivial name) is a nickel arsenic sulfide mineral with formula NiAsS. It crystallizes in the isometric system showing diploidal symmetry. It occurs as euhedral to massive opaque, metallic grey-black to silver white forms. Gersdorffite belongs to a solid solution series with cobaltite, CoAsS. Antimony freely substitutes also leading to ullmannite, NiSbS. It has a Mohs hardness of 5.5 and a specific gravity of 5.9 to 6.33.
Gersdorffite has three crystallisation forms: Gersdorffite-P213 (NiAsS), Gersdorffite-Pa3 (Ni(As,S)2) and Gersdorffite-Pca21 (NiAsS). Gersdorffite occurs as a hydrothermal vein mineral along with other nickel sulfides. Associated minerals include nickeline, nickel-skutterudite, cobaltite, ullmannite, maucherite, löllingite, platinum-group minerals, millerite, pyrite, marcasite, and chalcopyrite.