XRD has been applied to component interaction in the Nd - Re - B system. Is
othermal sections have been constructed for the phase diagram at 600 degree
sC (a region < 33 at.% boron) and 800 degreesC (> 33 at.% boron). It is con
firmed that it contains the previously known borides Nd2Re3B6 (Pr2Re3B6 str
ucture type) and Nd8Re13-xB12 (Pr8Re13-xB12 structure type). Two new ternar
y compounds are reported: similar to NdRe4B4 considered to have a tetragona
l incommensurate structure and similar to Nd5Re2B6, whose structure is unkn
own.