The isothermal section of the Nd-Ag-Si phase diagram at 600 degrees C
over the whole concentration region has been constructed using X-ray p
hase analysis. Four NdAg2Si2 (CeGa2Al2-type), NdAgSi (AlB2-type), NdAg
0.2-0.25Si1.8-1.25 (alpha-ThSi2-type) and Nd5Ag0.5Si3.5 (Sm5Ge4-type).
The crystal structure of the Nd5Ag0.5Si3.5 compound has been determin
ed by single-crystal analysis; other structures have been established
using X-ray powder diffraction data.