Titanium Phosphide, TiP

When hydrogen phosphide acts upon cold titanic chloride a yellow, crystalline substance is obtained which on heating yields hydrogen phosphide and hydrogen chloride, and leaves a residue of titanium phosphide, TiP, as a brittle mass with metallic lustre and density of 3.95. This substance is insoluble in dilute and concentrated acids and alkalis, but burns in air, and when heated in chlorine forms a yellow sublimate of TiCl₄.PCl₅.