Abstract
The high-pressure behaviour of Sr2NiMoO6 has been measured up to ∼6 GPa using neutron powder diffraction. With increasing pressure the tetragonal (I4/m) symmetry is maintained and the structure becomes more distorted. The distortion is a result of increased octahedral tilting away from the idealised cubic symmetry by rotation around the c-axis in the ab plane. The pressure equation of state has been determined and gives values of V0 = 243.10(2) Å3, B0 = 155(2) GPa and B’ = 3.1(6). We also report the high temperature behaviour at ambient pressure and observe a transition from tetragonal to cubic symmetry at ∼ 573 K.
Original language | English |
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Article number | 121474 |
Journal | Journal of Solid State Chemistry |
Volume | 290 |
DOIs | |
State | Published - Oct 2020 |
Externally published | Yes |
Keywords
- High-pressure
- High-temperature
- Neutron diffraction
- Octahedral tilting
- Perovskite
- SrNiMoO