Phase stability of the layered oxide, Ca2Mn3O8; probing interlayer shearing at high pressure
| Autor: | Christopher J. Ridley, Donna C. Arnold, Laura J. Vera Stimpson, Kevin J. W. Etherdo-Sibley, Craig L. Bull |
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| Rok vydání: | 2020 |
| Předmět: |
Shearing (physics)
Bulk modulus Materials science Neutron diffraction Oxide Thermodynamics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Bond length chemistry.chemical_compound Molecular geometry chemistry Chemistry (miscellaneous) Compressibility QD General Materials Science 0210 nano-technology Anisotropy |
| Zdroj: | Materials Advances. 1:1841-1848 |
| ISSN: | 2633-5409 |
| DOI: | 10.1039/d0ma00464b |
| Popis: | We have performed high–pressure neutron diffraction studies on the layered oxide, Ca2Mn3O8. Studies up to approximately 6 GPa at temperatures of 120 and 290 K demonstrate that there are no structural phase transitions within this pressure range. Fits of the unit–cell volume to a Birch-Murngahan\ud equation of state gives values for the bulk modulus of 137(2) GPa and 130(2) GPa at temperatures of 290 K and 120 K respectively possibly suggesting that Ca2Mn3O8 is more compressible at\ud lower temperature. Furthermore, compression along the principal axes are anisotropic on the local\ud scale. Comparison of individual bond lengths and bond angle environments further demonstrate that\ud compression is complex and likely results in a shearing of the layers. |
| Databáze: | OpenAIRE |
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