Nickel arsenide
Chemical compound of nickel and arsenic
From Wikipedia, the free encyclopedia
Nickel arsenide refers to inorganic compounds composed of nickel and arsenic. Several forms exist including a monoarsenide with the chemical formula NiAs and another with the formula Ni5As2.[2] It is highly toxic and a known carcinogen.[3]
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| Identifiers | |
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3D model (JSmol) |
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| ECHA InfoCard | 100.043.776 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| AsNi | |
| Molar mass | 133.6150 g·mol−1 |
| Appearance | red solid |
| Density | 7.57 g/cm3 |
| Melting point | 968 °C (1,774 °F; 1,241 K) |
| nearly insoluble | |
| Hazards | |
| GHS labelling: | |
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| Danger | |
| H317, H350i, H372, H410 | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
6000 mg/kg (acute oral, rat)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Occurrence
Preparation
Nickel arsenide can be prepared by direct combination of the elements:[7]
- Ni(s) + As(s) → NiAs(s)
History
Nickel arsenide was one of the first compounds that revealed the toxicity of nickel. The damage to the miners' lungs was documented by Georgius Agricola in the 16th century: "kupfer-nickel" ores in the Schneeberg mines contained red-colored NiAs mineral originally mistaken for the copper ore, thus the German: kupfer (copper) in the name. The German: Nickel (demon) name was reflecting the damage it did to the health of the workers,[8] in addition to them being unable to extract any copper from this ore.