%0 Journal Article %1 WOS:000223017300037 %A Paraguassu, W %A Souza, AG %A Maczka, M %A Freire, PTC %A Melo, FEA %A Mendes, J %A Hanuza, J %C TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND %D 2004 %I IOP PUBLISHING LTD %J JOURNAL OF PHYSICS-CONDENSED MATTER %K imported %N 28 %P 5151-5161 %R 10.1088/0953-8984/16/28/033 %T Raman scattering study of NaAl(MoO4)(2) crystal under high pressures %V 16 %X The high-pressure Raman spectra of ferroelastic NaAl(MoO4)(2) have been measured at room temperature. The studies indicated that this crystal exhibits two pressure-induced phase transitions at about 1.1 and 3.3 GPa. The first transition is connected with slight rotation of the MoO4-2 tetrahedra with loss of the inversion centre. The second transition is connected with significant distortion of the MoO42- tetrahedra and Al3+ coordination sphere. By performing the lattice dynamics calculations in the starting phase (monoclinic C-2h(6)) we have been able to make an assignment of the Raman modes of this material. The deep knowledge of the modes helped us to get fundamental insights into the mechanism driving the structural changes occurring in NaAl(MoO4)(2). The two phase transitions observed in the 0.0-4.2 GPa pressure range are completely reversible.

@article{WOS:000223017300037, abstract = {The high-pressure Raman spectra of ferroelastic NaAl(MoO4)(2) have been measured at room temperature. The studies indicated that this crystal exhibits two pressure-induced phase transitions at about 1.1 and 3.3 GPa. The first transition is connected with slight rotation of the MoO4-2 tetrahedra with loss of the inversion centre. The second transition is connected with significant distortion of the MoO42- tetrahedra and Al3+ coordination sphere. By performing the lattice dynamics calculations in the starting phase (monoclinic C-2h(6)) we have been able to make an assignment of the Raman modes of this material. The deep knowledge of the modes helped us to get fundamental insights into the mechanism driving the structural changes occurring in NaAl(MoO4)(2). The two phase transitions observed in the 0.0-4.2 GPa pressure range are completely reversible.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}, author = {Paraguassu, W and Souza, AG and Maczka, M and Freire, PTC and Melo, FEA and Mendes, J and Hanuza, J}, biburl = {https://www.bibsonomy.org/bibtex/2af8d7c80d1d79ccf4d1d2cbc54efb6e5/ppgfis_ufc_br}, doi = {10.1088/0953-8984/16/28/033}, interhash = {3e0a2321938e6239798976e86f5436ed}, intrahash = {af8d7c80d1d79ccf4d1d2cbc54efb6e5}, issn = {0953-8984}, journal = {JOURNAL OF PHYSICS-CONDENSED MATTER}, keywords = {imported}, number = 28, pages = {5151-5161}, publisher = {IOP PUBLISHING LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Raman scattering study of NaAl(MoO4)(2) crystal under high pressures}, tppubtype = {article}, volume = 16, year = 2004 }