Gallium Liquid Metal. Gallium is a lustrous silver metal that melts at just 29ºc (84ºf). It is solid at room temperature but when it comes in contact with cesium, mercury , and rubidium it becomes liquid (when heated slightly).
Once it turns into liquid metal, gallium's colour is silvery white. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical.read more. The liquid metal ion source of gallium is used for creating a focused gallium ion beam.