Table 1 Crystallographic parameters and composition from XRD and SEM-EDX analysis at room-temperature.
Compound | \({\text {Pr}}_2 {\text {Co}}_{0.86} {\text {Si}}_{2.88}\) | |||||
Structure | \({\text {U}}_2 {\text {RuSi}}_3\) type | |||||
Space group | P6/mmm | |||||
Lattice parameters | ||||||
a (Å) | 8.101 | |||||
c (Å) | 4.212 | |||||
\({\text {R}}_{\rm{f}}\)(%) | 0.766 | |||||
\({\text {R}}_{{\rm{Bragg}}}\)(%) | 1.33 | |||||
Atomic parameters | Estimated composition | |||||
|---|---|---|---|---|---|---|
Atom | Wyckoff site | x | y | z | Full-Rietveld | EDX |
Pr1 | 1a | 0 | 0 | 0 | Â | Â |
Pr2 | 3f | 1/2 | 0 | 0 | Â | Â |
Co | 2d | 1/3 | 2/3 | 1/2 | \({\text {Pr}}_2 {\text {Co}}_{0.95(1)} {\text {Si}}_{2.96(2)}\) | \({\text {Pr}}_2 {\text {Co}}_{0.98(1)} {\text {Si}}_{2.87(1)}\) |
Si | 6m | 0.1671(1) | 0.3342(2) | 1/2 | Â | Â |