Radium antimonide could probably be prepared by
the reaction of Ra and Sb metals. Ra melts at 700°C
and is stable in an inert atmosphere until its boiling
point of 1737°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 Ra metal at about 680 °C onto molten Sb
metal.
However, this reaction has never been carried out
due, perhaps, to the intense radioactivity of 226Ra
atom. It is probable that Ra forms the same type of antimonide
compounds as Ba but there is no industrial or
commercial interest and no academic interest in these
compounds due to the care required in handling such
compounds.
