Table 1.

Results of the Rietveld refinement of final CuSe products.

	CuSe-PM	CuSe-VM
Amount of hexagonal CuSe (Pmmc/63) (%)	78.2 ± 0.8	98.4 ± 0.7
Crystallite size (nm)	24 ± 2	64 ± 2
Strain (%)	1.45 ± 0.07	not contributing
Unit cell parameter a (nm)	0.3972 ± 0.0017	0.3941 ± 0.0003
Unit cell parameter c (nm)	1.7215 ± 0.0074	1.7232 ± 0.0017

PM-planetary milled; VM-vibratory milled.