Ce-Ag-P system

Phase equilibria were established in the Ce-Ag-P ternary system up to 80 at .% of P and the CeP-CeP2-Ag region (30-70 at.% of P) for isothermal section s at 400 degrees C and 800 degrees C, respectively. The isothermal sections have been formed basing on X-ray analysis. The existence of the CeAgP2 ter nary phosphide at 800 degrees C and its decomposition to CeP, Ag3P11 and Ag , when decreasing the temperature to 400 degrees C, has been established. I ts crystal structure has been investigated using X-ray single crystal and p owder methods. The CeAgP2 compound exhibits crystal structure with tetragon al symmetry (14/mmm space group, a = 0.4002(1) nm, c = 2.042(2) nm).