Powder diffraction data for borides Pd3B and Pd5B2 and the formation of an amorphous boride Pd2B

Powder diffraction data and refined unit cell parameters of two palladium borides were determined. For Pd 3 B (space group Pnma ; Fe 3 C type) it was found that a =0.54602(3) nm, b =0.75596(4) nm, c =0.48417(4) nm and for Pd 5 B 2 (space group C 2/ c ; Mn 5 C 2 type) a =1.27759(12) nm, b =0.49497(5) nm, c =0.54704(4) nm, β=97.049(7)°. Further, it was shown that the position of the principal scattering peak of the amorphous Pd 2 B fulfils the Nagel–Tauc criterion about glass forming ability.