HgWO 4 at ambient pressure is characterized using a combination of ab initio calculations, X-ray diffraction and Raman scattering measurements. The effect of low pressure and temperature on the structural stability is ...
[EN] We explore the potential of Tb- and Yb-doped InVO4, InTaO4, and InNbO4 for applications as phosphors for light-emitting sources. Doping below 0.2% barely change the crystal structure and Raman spectrum but provide ...
In this work we present a ¿rst-principles density functional study of the vibrational properties of ZnAl2
O4
and ZnGa2
O4 as function of hydrostatic pressure. Based on our previous structural characterization of these
two ...
Vilaplana Cerda, Rosario Isabel; Gomis Hilario, Oscar; Manjón Herrera, Francisco Javier; Ortiz, H. M.; Pérez González, E.; López Solano, Javier; Rodríguez Hernández, Plácida; Múñoz, Alfonso; Errandonea, Daniel; Ursaki, V.; Tiginyanu, Ivan(American Chemical Society, 2013-08)
We report on Raman scattering measurements in mercury digallium selenide (HgGa2Se4) up to 25 GPa. We also performed, for the low-pressure defect-chalcopyrite structure, lattice-dynamics ab initio calculations at high ...
This work reports an experimental and theoretical lattice dynamics study of
nanocrystalline Y3Ga5O12 (YGG) garnet at high pressures. Raman scattering measurements in
nanocrystalline Tm3+-doped YGG garnet performed up to ...
Errandonea, Daniel; Kumar, R.S.; Achary, S.N.; Gomis Hilario, Oscar; Manjón Herrera, Francisco Javier; Shukla, R.; Tyagi, A.K.(American Institute of Physics (AIP), 2012-03-08)
In this paper we report a new high-pressure rhombohedral phase of Ce2Zr2O8 observed in high-pressure angle-dispersive x-ray diffraction and Raman spectroscopy studies up to nearly 12 GPa. The ambient-pressure cubic phase ...
Errandonea, Daniel; Gomis Hilario, Oscar; García-Domene, B.; Pellicer Porres, Julio; Katari, V.; Achary, S. N.; Tyagi, A. K.; Popescu, C.(American Chemical Society, 2013-11-04)
A new wolframite-type polymorph of InVO4 is identified under compression near 7 GPa by in situ high-pressure (HP) X-ray diffraction (XRD) and Raman spectroscopic investigations on the stable orthorhombic InVO4. The structural ...
García-Domene, B.; Sans Tresserras, Juan Ángel; Gomis, O.; Manjón Herrera, Francisco Javier; Ortiz, H. M.; Errandonea, Daniel; Santamaría Pérez, David; Martinez-Garcia, D.; Vilaplana Cerda, Rosario Isabel; Pereira, A. L. J.; Morales-Garcia, A.; Rodríguez Hernández, Plácida; Muñoz, Alfonso; Popescu, Catalin; Segura, A.(American Chemical Society, 2014-09-04)
High-pressure powder X-ray diffraction and Raman scattering measurements in cubic bixbyite-type indium oxide (c-In2O3) have been performed at room temperature. On increasing pressure c-In2O3 undergoes a transition to the ...
Santamaría Pérez, David; Bandiello, Enrico; Errandonea, Daniel; Ruiz-Fuertes, Javier; Gomis Hilario, Oscar; Sans, Juan Ángel; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, Plácida; Muñoz, Alfonso(American Chemical Society, 2013-06-13)
We have performed an experimental study of the crystal structure, lattice dynamics, and optical properties of silver chromate (Ag2CrO4) at ambient temperature and high pressures. In particular, the crystal structure, ...
[EN] The 5d transition metals have attracted specific interest for high-pressure studies due to their extraordinary stability and intriguing electronic properties. In particular, iridium metal has been proposed to exhibit ...
[EN] The effects of high pressure on the crystal
structure of orthorhombic (Pnma) perovskite-type cerium
scandate were studied in situ under high pressure by means of
synchrotron X-ray powder diffraction, using a ...
[EN] The high-pressure behavior of technologically important visible-light photocatalytic semiconductor In.NbO4, adopting a monoclinic wolframite-type structure at ambient conditions, was investigated using synchrotron-based ...
Ruiz Fuertes, Javier; Gomis, O.; León Luis, S. F.; Schrodt, N.; Manjón Herrera, Francisco Javier; Ray, Sudeshna; Santamaría Pérez, David; Sans Tresserras, Juan Ángel; Ortiz, H. M.; Errandonea, Daniel; Ferrer Roca, Chantal; Segura, A.; Martínez García, Domingo; Lavin, V.; Rodríguez Mendoza, U. R.; Muñoz, A.(IOP Publishing: Hybrid Open Access, 2016-01-15)
A structural transformation from the zircon-type structure to an amorphous phase has been found in YVO4:Eu3+ nanoboxes at high pressures above 12.7 GPa by means of x-ray diffraction measurements. However, the pair distribution ...
[EN] A wide band gap is one of the essential requirements for metal iodates to be used as nonlinear optical materials. Usually, the band gap of these materials decreases under the application of pressure. Herein, we introduce ...
A pressure-induced phase transition, associated with an increase of the coordination number of In and Ta, is detected beyond 13 GPa in InTaO4 by combining synchrotron x-ray diffraction and Raman measurements in a diamond-anvil ...
We have studied CaWO4 under compression using Ne as pressure-transmitting medium at room temperature by means of synchrotron X-ray powder diffraction. We have found that CaWO4 beyond 8.8 GPa transforms from its low-pressure ...
Vilaplana Cerda, Rosario Isabel; Gomis Hilario, Oscar; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, P.; Muñoz, Alfonso; Errandonea, Daniel; Achary, S.N.; Tyagi, A.K.(American Institute of Physics (AIP), 2012-11-21)
High-pressure Raman scattering measurements have been performed in wulfenite (PbMoO4) for both bulk and nanocrystalline powders up to 22 GPa. Our Raman scattering measurements evidence the phase transition from the tetragonal ...
[EN] This work reports the structural and vibrational properties of nanocrystals of corundum-type In2O3 (rh-In2O3) at high pressures by using angle-dispersive x-ray diffraction and Raman scattering measurements up to 30 ...
Monteseguro, Virginia; Errandonea, Daniel; Achary, Srungarpu N.; Sans-Tresserras, Juan Ángel; Manjón, Francisco-Javier; Gallego-Parra, Samuel; Popescu, Catalin(American Chemical Society, 2019-08-19)
[EN] The effects of pressure on the crystal structure of aurophilic tetragonal gold iodide have been studied by means of powder X-ray diffraction up to 13.5 GPa. We found evidence of the onset of a phase transition at 1.5 ...
[EN] The crystal structure of CO2-filled pure-SiO2 LTA zeolite has been studied at high pressures and temperatures using synchrotron-based X-ray powder diffraction. Its structure consists of 13 CO2 guest molecules, 12 of ...