The B-Cd diagram has been reported to consist of four phases: the liquid, the terminal solid solution (Cd), the terminal solid solution based on alpha B, and the terminal solid solution based on AB. Experimental results show no measurable solubility range in any of the solid phases, and no evidence of intermetallic compounds has been reported. The equilibration of liquid cadmium with solid elemental boron reportedly was not used to determine the solubility of boron in liquid cadmium. It is suggested that the B-Cd equilibrium diagram would show a monotectic reaction with a substantial miscibility gap in the liquid, perhaps similar to the B-Zn equilibrium diagram postulated by Okamoto (1991).