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Arsenic and Antimony – Comparison – Properties

This article contains comparison of key thermal and atomic properties of arsenic and antimony, two comparable chemical elements from the periodic table. It also contains basic descriptions and applications of both elements. Arsenic vs Antimony.

arsenic and antimony - comparison

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Arsenic and Antimony – About Elements


Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid.


Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl.

Arsenic in Periodic Table

Antimony in Periodic Table

Source: www.luciteria.com

Arsenic and Antimony – Applications


Arsenic is used as a doping agent in semiconductors (gallium arsenide) for solid-state devices. It is also used in bronzing, pyrotechnics and for hardening shot. Arsenic compounds can be used to make special glass and preserve wood.


The largest applications for metallic antimony are an alloy with lead and tin and the lead antimony plates in lead–acid batteries. Alloys of lead and tin with antimony have improved properties for solders, bullets, and plain bearings. Antimony can be used in fire retardants for many commercial and domestic products. Antimony trichloride is used in the manufacturing flame-proofing compounds as well as paints, ceramic enamels, glass and pottery. Other uses include ball bearings and mixing with alloys with percentages ranging from 1 to 20 greatly increasing the hardness and mechanical strength of the lead. The capability to strengthen already strong alloys is its largest and most widespread use.

Arsenic and Antimony – Comparison in Table

Element Arsenic Antimony
Density 5.727 g/cm3 6.697 g/cm3
Ultimate Tensile Strength N/A 11 MPa
Yield Strength N/A N/A
Young’s Modulus of Elasticity 8 GPa 55 GPa
Mohs Scale 3.5 3.15
Brinell Hardness 1440 MPa 300 MPa
Vickers Hardness N/A N/A
Melting Point 817 °C 631 °C
Boiling Point 614 °C 1950 °C
Thermal Conductivity 50 W/mK 24 W/mK
Thermal Expansion Coefficient 5.6 µm/mK 11 µm/mK
Specific Heat 0.33 J/g K 0.21 J/g K
Heat of Fusion N/A 19.87 kJ/mol
Heat of Vaporization 34.76 kJ/mol 77.14 kJ/mol