What are alloys? Name an important alloy which contains some of the lanthanoid metals. Mention its uses.

An alloy is a homogenous mixture of two or more metals or non-metals. Lanthanoid is used for the production of alloy steels for plates and pipes called as mischmetals. It contains about 95% lanthanoid metal, iron and traces of Al, S, C etc in traces. It is used in magnesium-based alloy to produce bullets, shells and lighter flint.