| Stibarsen | |
|---|---|
 Size: 4.7 × 3.3 × 3.3 cm | |
| General | |
| Category | Arsenic minerals |
| Formula (repeating unit) | AsSb |
| IMA symbol | Sbr[1] |
| Crystal system | Trigonal |
| Crystal class | Hexagonal scalenohedral (3m) H-M symbol: (3 2/m) |
| Space group | R3m (No. 166) Pearson symbol: hR6 |
| Unit cell | a = 4.045, c = 10.961 [Å], Z = 6 |
| Identification | |
| Color | White, gray, grayish white, reddish white |
| Crystal habit | Reniform ("kidney like") |
| Cleavage | Perfect |
| Mohs scale hardness | 3–4 |
| Luster | Metallic |
| Streak | grayish-black |
| Diaphaneity | Opaque |
| Specific gravity | 5.8–6.2 (meas.); 6.37 (calc.) |
| Other characteristics | Non-fluorescent, nonmagnetic |
| References | [2][3][4] |
Stibarsen or allemontite is a natural form of arsenic antimonide (AsSb) or antimony arsenide (SbAs). The name stibarsen is derived from Latin stibium (antimony) and arsenic, whereas allemontite refers to the locality Allemont in France where the mineral was discovered.[3][5] It is found in veins at Allemont, Isère, France; Valtellina, Italy; and the Comstock Lode, United States; and in a lithium pegmatites at Varuträsk, Sweden. Stibarsen is often mixed with pure arsenic or antimony,[6] and the original description in 1941 proposed to use stibarsen for AsSb and allemontite for the mixtures.[7] Since 1982, the International Mineralogical Association considers stibarsen as the correct mineral name.[8]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Stibarsen. Webmineral
- ^ a b Stibarsen. Mindat.org
- ^ Stibarsen. Handbook of mineralogy
- ^ Allemontite. Mindat.org
- ^ allemontite. Encyclopædia Britannica on-line
- ^ Michael Fleischer "New mineral names" American Mineralogist 26 (1941) 456
- ^ Cite error: The named reference
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