The arsenic minerals or arsenic group are a group of trigonal symmetry minerals composed of arsenic-like elements, and one alloy.[1]
| Arsenic | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | FeAsS (arsenopyrite) |
| Strunz classification | 01.CA.05 |
| Dana classification | 01.03.01 (Arsenic Group) |
| Crystal system | Monoclinic |
| Crystal class | Sulphide |
| Space group | Trigonal, hexagonal scalenohedral |
| Identification | |
| Colour | Lead gray, grey, white |
| Crystal habit | Lamellar, nodular, reniform |
| Cleavage | Perfect |
| Fracture | Subconchoidal, uneven |
| Mohs scale hardness | 3.5 |
| Streak | Black |
| Diaphaneity | Opaque |
| Density | 5.7 |
The elements are arsenic, antimony and bismuth.[2] The alloy is stibarsen (SbA) an alloy of arsenic and antimony.[3]
References edit
- ^ "Arsenic Mineral Data". webmineral.com. Retrieved 2021-02-11.
- ^ "Arsenic: The mineral native Arsenic information and pictures". www.minerals.net. Retrieved 2021-02-11.
- ^ "Stibarsen". www.mindat.org. Retrieved 2021-02-11.
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