Antimony

Photograph of stibnite courtesy of Mineralite

Generally found in one of two allotropes and has both metallic and non-metallic properties. From latin 'antimonium' used by Constantinius Africanus (c. 1050) to refer to Stibnite. The main source of this element is Stibnite (Sb₂ S₃), a widely distributed but not very plentiful ore. Antimony is a relatively stable element and is not attacked by dilute acids or alkalis. It is a poor electrical and thermal conductor. Applications of antimony and its alloys include its use as an alloying element for hardening other metals, a bearing material and in batteries. High purity antimony is used in the semiconductor industry.

Symbol

Sb

Discovered

1450

Abundance

0.2 ppm of the Earth’s crust.

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Atomic number	51		Clip
Atomic / Molecular Weight	121.75	gmol-1	Clip
Density	6692	kgm-3	Clip
Lattice constant	451	fm	Clip
Melting Point	904	K	Clip
Boiling Point	1873	K	Clip
Linear expansivity	0.000011	K-1	Clip
Specific heat capacity	209	Jkg-1K-1	Clip
Thermal conductivity	25.5	Wm-1K-1	Clip
Bulk Modulus of Rigidity	42000000000	Nm-2	Clip
Electromotive Series	-0.1	V	Clip

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See also: Antimony Hydride, Periodic Table, Pewter.