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Sulfur (16S32.066)
[7704-34-9]

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Elemental Form


Known in ancient times as brimstone, sulfur is essential to life. It is pale yellow, odorless, brittle, nonmetallic solid. Sulfur has unusual optical and electrical properties and is a good electrical insulator. It occurs native near volcanoes and hot springs and readily combines with many elements. A large amount of sulfur is used in the production of sulfuric acid, which some refer to as the most important manufactured chemical.
Melting Point115.21°CBoiling Point444.6°C
Density2.07g/cm3Themal Conductivity6.31x10-4cal/cm2/cm/s/°C
Specific Heat @ 25°C0.175cal/g°CHeat of Fusion0.34k-cal/g-atom
Heat of Vaporization3.01k-cal/g-atomAtomic Volume15.5W/D
First Ionization Energy239K-cal/g-moleElectronegativity2.5Pauling's
Covalent Radius1.02AngstromsMohs Hardness @ 20°C1.5-2.5
Linear Coefficient of Expansion6.5x10-6K-1Crystal StructureCubic
Critical Temperature1040°CCritical Pressure116atm
Critical Volume2.48ml/gVapor Pressure @ 1727°C9.5x10-11atm