Calcium antimonide can be prepared by the reaction
of Ca and Sb metals. Ca melts at 842°C and is stable in
an inert atmosphere until its boiling point of 1484°C is
reached. Since Sb melts at 630.6°C and is stable in an
inert atmosphere until its boiling point of 1587°C, the
reaction is best carried out by evaporating Ca metal at
about 880°C onto molten Sb metal.
