Table 1 Force constant, Coordination number, Inter-atomic Distances (Å) and Angles (deg) and Force constant values (N/cm) for Orthorhombic PrMnO3
From: Zone center phonons of the orthorhombic RMnO3(R = Pr, Eu, Tb, Dy, Ho) perovskites
Force constant | K1 | K2 | K3 | K4 | K5 | K6 | K7 | K8 | K9 | H1 | H2 | H3 | H4 | H5 | H6 | H7 | H8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Coord. Number. | 8 | 8 | 8 | 4 | 8 | 4 | 8 | 4 | 8 | 8 | 8 | 4 | 4 | 8 | 8 | 7 | 8 |
Distance/Angle | 1.91 | 1.95 | 2.21 | 2.36 | 2.40 | 2.48 | 2.62 | 3.17 | 3.52 | 89 | 67 | 110 | 90 | 56 | 66 | 160 | 120 |
Force constant values | 0.597 | 0.535 | 0.950 | 0.456 | 0.019 | 0.311 | 0.382 | 0.335 | 0.598 | 0.432 | 0.413 | 0.404 | 0.373 | 0.338 | 0.329 | 0.136 | 0.022 |