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Arsenic, a steel-gray, semimetallic solid, is very brittle, crystalline and poisonous. Elemental arsenic occurs in two solid modifications: the ordinary, stable, metallic-gray form and the yellow form. It oxidizes in air and, when heated, is rapidly oxidized to arsenous oxide (AS<sub>2</sub>O<sub>3</sub>) with a garlic odor. Arsenic is used as a doping agent in semiconductor materials.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(33As74.92159)||Atomic Volume||131.1W/D|
|CAS #||7440-38-2||First Ionization Energy||231K-cal/g-mole|
|Melting Point||817°C(28atm)||Covalent Radius||1.20Angstroms|
|Boiling Point||614°C(sublimes)||Mohs Hardness @ 20°C||3.5|
|Density||5.778g/cm3||Linear Coefficient of Expansion @ 20°C||4.7x10-6K-1|
|Specific Heat @ 25°C||0.082cal/g°C||Electrical Resistivity @ 20°C||33.3µΩ-cm|
|Heat of Fusion||88.5k-cal/g-atom||Crystal Structure||Rhombohedral|
|Heat of Sublimation||88.5k-cal/g-atom||Magnetic Susceptibility @ 20°C||-5.5x10-6cgs|