%0 Journal Article %1 WOS:000326853500005 %A Coelho, M N %A Freire, P T C %A Maczka, M %A Luz-Lima, C %A Saraiva, G D %A Paraguassu, W %A Filho, A G Souza %A Pizani, P S %C RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS %D 2013 %I ELSEVIER %J VIBRATIONAL SPECTROSCOPY %K Molybdate; Phase Raman pressure; scattering; transition} {High %P 34-39 %R 10.1016/j.vibspec.2013.05.007 %T High-pressure Raman scattering of MgMoO4 %V 68 %X In this paper, we present results of high-pressure Raman scattering studies in beta-MgMoO4 from atmospheric to 8.5 GPa. The experiments were carried out using methanol-ethanol as pressure medium. By analyzing the pressure dependence of the Raman data (change in the number of lattice modes, splitting of bands and wavenumber discontinuities) we were able to observe a phase transition undergone by the beta-MgMoO4 at 1.4 GPa, which is only completed at similar to 5 GPa. The transition was observed to be irreversible and the modifications in the Raman spectra were attributed to the changes in coordination of Mo ions from tetrahedral to octahedral. The transition possibly changes the original C2/m symmetry to C2/m or to P2/c. Implication on the phase transition for similar molybdate structures, such as alpha-MnMoO4, is also highlighted. (C) 2013 Elsevier B.V. All rights reserved.

@article{WOS:000326853500005, abstract = {In this paper, we present results of high-pressure Raman scattering studies in beta-MgMoO4 from atmospheric to 8.5 GPa. The experiments were carried out using methanol-ethanol as pressure medium. By analyzing the pressure dependence of the Raman data (change in the number of lattice modes, splitting of bands and wavenumber discontinuities) we were able to observe a phase transition undergone by the beta-MgMoO4 at 1.4 GPa, which is only completed at similar to 5 GPa. The transition was observed to be irreversible and the modifications in the Raman spectra were attributed to the changes in coordination of Mo ions from tetrahedral to octahedral. The transition possibly changes the original C2/m symmetry to C2/m or to P2/c. Implication on the phase transition for similar molybdate structures, such as alpha-MnMoO4, is also highlighted. (C) 2013 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS}, author = {Coelho, M N and Freire, P T C and Maczka, M and Luz-Lima, C and Saraiva, G D and Paraguassu, W and Filho, A G Souza and Pizani, P S}, biburl = {https://www.bibsonomy.org/bibtex/2573ec731580ff694e9b82d17dfcdf14f/ppgfis_ufc_br}, doi = {10.1016/j.vibspec.2013.05.007}, interhash = {cbc475d5884cf78d6b76a4f9fd7951f3}, intrahash = {573ec731580ff694e9b82d17dfcdf14f}, issn = {0924-2031}, journal = {VIBRATIONAL SPECTROSCOPY}, keywords = {Molybdate; Phase Raman pressure; scattering; transition} {High}, pages = {34-39}, publisher = {ELSEVIER}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {High-pressure Raman scattering of MgMoO4}, tppubtype = {article}, volume = 68, year = 2013 }