gediegen Antimon Gewicht: 352,94 g Fundort: Consolidated Murchison Mines, Gravelotte, Transvaal, Südafrika (Fundort bei Mindat.org) — Photo: J. Patrick Fischer · CC BY-SA 4.0
Antimony
A lustrous grey metalloid (symbol Sb, atomic number 51) that occurs in nature mainly as the sulfide mineral stibnite.
Intro adapted from Wikipedia (CC BY-SA).
Antimony is an IMA-recognized mineral species in the native element class, with the chemical formula Sb.
It crystallizes in the trigonal crystal system (space group R-3m). It is a member of the Arsenic structural group.
Key properties: Mohs hardness 3–3.5; specific gravity 6.61–6.72; typically gray; Gray streak; Metallic luster.
IMA symbol Sb, grandfathered status — known before the IMA’s founding, named in 1748.
Found in hydrothermal Sb–Ag veins.
It is found associated with Silver, stibnite, allemontite, sphalerite, pyrite, galena, quartz.
The name comes from the Latin antimonium; possibly of Arabic origin; the chemical symbol from the Latin stibium, mark.
Collections: Metals & Native Elements, Rare & Remarkable.