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GALLIUM (31Ga69.723)

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Gallium is grayish when solid: tin or silvery colored when molten. It has one of the longest liquid ranges of any metal, has a low vapor pressure even at high temperatures and shows a tendency to remain in a supercool state. Gallium is one of four metals that can be molten at room temperature. It has a higher density as a liquid than as a solid. Gallium can be alloyed with most metals and is frequently used as such to reduct the melting point.

Property Name Property Value Property Name Property Value
Atomic Code (31Ga69.723) Atomic Volume 11.8W/D
CAS # 7440-55-3 First Ionization Energy 138K-cal/g-mole
Electronegativity 1.6Pauling's
Melting Point 29.8°C Covalent Radius 1.26Angstroms
Thermal Conductivity 0.08cal/cm2/cm/s/°C Mohs Hardness @ 20°C 1.5-2.5
Boiling Point 2403°C Cubic Coefficient of Expansion @ 20°C 5.4x10-6K-1
Density 5.91g/cm3 Electrical Resistivity 53.4µΩ-cm
Specific Heat @ 25°C 0.088cal/g°C Crystal Structure Orthorhombic
Heat of Fusion 19.18cal/g Vapor Pressure @ 2400°C 760mmHg
Heat of Vaporization 950-1020cal/g

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