Gallium (Ga)
Mendeleev predicted the existence of gallium (described as ekaaluminum), and it was discovered in 1875. Gallium is usually found in diaspore, sphalerite, germanite, bauxite, and coal.
Ultra-pure gallium is silvery, and the solid metal fractures somewhat like glass. It is used in low-melting alloys with most metals. Because Gallium expands as it solidifies it should be stored in a flexible container.
Gallium can be liquid near room temperature, making it useful in high-temperature thermometers. It also tends to supercool below its freezing point.
Gallium forms a mirror when painted on glass and is widely used in semiconductors, transistors, and other solid-state devices.
Strem, An Ascensus Company CAS# 7440-55-3. 10g. Gallium metal (99.99%). MFCD00134045
CAS# 7440-55-3. 10g. Gallium metal (99.99%). MFCD00134045. Molecular Weight: 69.72. Molecular Formula: Ga. Color/form: Strem# 93-3145. http://www.strem.com/catalog/v/93-3145/
