CAS number: 7440-55-3
Density: 5.904 g/cm3
Atomic Number: 31
Atomic Weight: 69,723
Melting Point: 29,78℃ (85.58°F)
Gallium is a group IIIA metal. Solid gallium is blue-gray, and liquid gallium is silver-white. Gallium is hard and brittle at low temperatures, and melts when it exceeds room temperature, soluble in acids and alkalis, slightly soluble in mercury, and highly corrosive. Gallium is relatively stable in dry air, an oxide film will be formed on the surface to prevent further oxidation, and it will lose its luster in humid air. The freezing point of gallium is very low. When it is converted from liquid to solid, the expansion rate is 3.1%, and it should be stored in a plastic container.
Gallium is widely used in semiconductor, solar, alloy, chemical and other fields due to its low melting point, high boiling point, good superconductivity, ductility, and excellent heat shrinkage and cold expansion properties.
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