It is a chemical element with the symbol Sb (from Latin: stibium) and atomic number 51.
A lustrous gray metalloid, Element Antimony is found in nature mainly as the sulfide mineral stibnite (Sb2S3).
Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl.Metallic antimony was also known, but it was erroneously identified as lead upon its discovery.
Antimony is a member of group 15 of the periodic table, one of the elements called pnictogens, and has an electronegativity of 2.05. In accordance with periodic trends, it is more electronegative than tin or bismuth, and less electronegative than tellurium or arsenic
Names and Identifiers
|EC Number :||231-146-5|
|Color:||silvery lustrous gray/ silvery-white|
Physical & Chemical Properties
|Boiling Point:||1908 K (1635 °C, 2975 °F)|
|Melting Point:||903.78 K (630.63 °C, 1167.13 °F)|
|Hazard Statements:||H302 + H332-H411|
|RIDADR:||UN 3264 8/PG 2|
The two Antimony isotopes are used for the production of medical radioisotopes. Sb-121 can be used for the production of I-124, although this medical radioisotope is usually produced via Te-124. Sb-121 and Sb-123 can both be used for the production of I-123, although the most common production route is via Xe-124 or Te-123.
Naturally occurring isotopes
|Isotope||Mass/Da||Natural abundance (atom %)||Nuclear spin (I)||Magnetic moment (μ/μN)|
|121Sb||120.9038212 (29)||57.21 (5)||5/2||3.3634|
|123Sb||122.9042160 (24)||42.79 (5)||7/2||2.5498|
|Isotope||Mass/Da||Half-life||Mode of decay||Nuclear spin||Nuclear magnetic moment|
|117Sb||116.90484||2.80 h||EC to 117Sn||5/2|
|118Sb||117.905533||3.6 m||EC to 118Sn||1|
|119Sb||118.90395||38.1 h||EC to 119Sn||5/2||3.45|
|120Sb||119.90508||15.89 m||EC to 120Sn||1||2.3|
|122Sb||121.90518||2.72 d||EC to 122Sn; β– to 122Te||2||-1.90|
|124Sb||123.905938||60.30 d||β– to 124Te||3||1.2|
|125Sb||124.905247||2.758 y||β– to 125Te||7/2||2.63|
|126Sb||125.90725||12.4 d||β– to 126Te||8||1.3|
|127Sb||126.906914||3.84 d||β– to 127Te||7/2||2.7|
|128Sb||127.90917||9.1 h||β– to 128Te||8||1.3|
|129Sb||128.90915||4.40 h||β– to 129Te||7/2|