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Listar por autor "Criado Vega, Alberto"
Mostrando ítems 1-20 de 24
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Artículo
1,1,3,3-tetramethylguanidinium dihydrogenorthophosphate
Criado Vega, Alberto; Diánez Millán, María Jesús; Pérez Garrido, Simeón; Fernandes, I. M L; Belsley, Michael Scott; Matos Gomes, Etelvina M. de (International Union of Crystallography, 2000)In the title compound, C 5 H 14 N 3 + H 2 PO 4 ˇ , the cation has a central guanidinium fragment ...
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Artículo
Benzyltrimethylammonium dihydrogen orthophosphate monohydrate
Criado Vega, Alberto; Diánez Millán, María Jesús; Estrada de Oya, María Dolores; Pérez Garrido, Simeón; Belsley, Michael Scott; Matos Gomes, Etelvina M. de (International Union of Crystallography, 2005)The title compound, C 10 H 16 N + H 2 PO 4 H 2 O, crystallizes in the centrosymmetric space ...
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Artículo
Collective excitations in liquid methanol: A comparison of molecular, lattice-dynamics, and neutron-scattering results
Alonso, J.; Bermejo, F. J.; García Hernández, M.; García Martínez, J. L.; Howells, W. S.; Criado Vega, Alberto (American Institute of Physics, 1992)The collective dynamics of liquid methanol‐d4 is studied by means of molecular‐dynamics simulation. The model potential ...
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Artículo
Correlated atomic motions in glassy selenium
Bermejo, F. J.; García Hernández, M.; Mason, T.; Martínez, J.L.; Enciso, E.; Criado Vega, Alberto (American Institute of Physics Publising LLC, 1994)The elastic and total (energy-integrated) structure factors for glassy selenium have been measured by means of neutron ...
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Trabajo Fin de Grado
Difracción de rayos X
Llamas Martínez, Paula (2021) -
Tesis Doctoral
Dinámica reticular y efectos de difracción en cristales moleculares
Criado Vega, Alberto (1983) -
Artículo
Evidence for a supercooled plastic-crystal phase in solid ethanol
Srinivasan, A.; Bermejo, F. J.; Andrés, A. de; Dawidowski, J.; Zúñigan, J.; Criado Vega, Alberto (American Physical Society, 1996)The existence of an orientationally disordered cubic phase of solid ethanol is revealed by x-ray diffraction and Raman ...
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Artículo
First- and Second-Order Thermal Diffuse Scattering (TDS) Intensity in Molecular Crystals: Influence on Crystal Structure Parameters
Criado Vega, Alberto; Conde Amiano, Alejandro; Márquez Delgado, Rafael (International Union of Crystallography, 1985)First- and second-order thermal diffuse scattering (TDS) intensities are calculated in the long-wave approximation ...
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Artículo
Incommensurate instability and lattice dynamics of potassium selenate within a semiempirical rigid-ion model
Etxebarria, I.; Pérez Mato, J. M.; Criado Vega, Alberto (American Institute of Physics Publising LLC, 1990)The lattice dynamics of potassium selenate is analyzed using a rigid-ion model with the selenate groups reduced to rigid ...
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Artículo
Lattice Dynamical Calculation of First-Order Thermal Diffuse Scattering in Phenothiazine
Criado Vega, Alberto; Conde Amiano, Alejandro; Márquez Delgado, Rafael (International Union of Crystallography, 1985)A computer program has been developed to calculate first-order thermal diffuse scattering (TDS) intensity from eigenvectors ...
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Artículo
Lattice Dynamics and Thermal Crystallographic Parameters in Phenothiazine
Criado Vega, Alberto; Conde Amiano, Alejandro; Márquez Delgado, Rafael (International Union of Crystallography, 1984)A computer program has been developed to study the lattice dynamics of molecular crystals in the harmonic approximation ...
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Artículo
Lattice-Dynamical Calculation of Second-Order Thermal Diffuse Scattering in Molecular Crystals
Criado Vega, Alberto; Conde Amiano, Alejandro; Márquez Delgado, Rafael (International Union of Crystallography, 1985)A computer procedure has been developed to calculate second-order thermal diffuse scattering (TDS) intensity for molecular ...
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Artículo
Low-frequency excitations in a molecular glass: Single-particle dynamics
Bermejo, F. J.; Alonso, J.; Criado Vega, Alberto; Mompeán, F.J.; Martínez, J.L.; García Hernández, M.; Chahid, A. (American Institute of Physics Publising LLC, 1992)The low-frequency dynamics of a molecular glass former has been investigated by means of inelastic neutron scattering from ...
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Artículo
Low-frequency excitations in glassy selenium: A comparison of neutron-scattering and molecular-dynamics results
García Hernández, M.; Bermejo, F. J.; Fak, B.; Martínez, J.L.; Enciso, E.; Almarza, N.G.; Criado Vega, Alberto (American Institute of Physics Publising LLC, 1993)The microscopic low-frequency dynamics of glassy selenium is investigated by means of the concurrent use of neutron inelastic ...
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Artículo
Microscopic dynamics of glycerol in its crystalline and glassy states
Bermejo, F. J.; Criado Vega, Alberto; Andrés, A. de; Enciso, E.; Schober, H. (American Physical Society, 1996)The dynamics of crystalline glycerol are studied by means of Raman spectroscopy and lattice dynamics calculations employing ...
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Artículo
Optical phonons, crystal-field transitions, and europium luminescence-excitation processes in Eu2BaCoO5: Experiment and theory
Taboada, S.; Andrés, A. de; Muñoz Santiuste, J.E.; Prieto, C.; Martínez, J.L.; Criado Vega, Alberto (American Institute of Physics Publising LLC, 1994)The Europium compound Eu2BaCoO5 has been studied by means of Raman and x-ray-absorption spectroscopies. The eigenfunctions ...
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Purely dynamical signature of the orientational glass transition
Jiménez Ruiz, M.; Criado Vega, Alberto; Cuello, Gabriel J.; Cabrillo, C.; Trouw, F. R.; Fernández Perea, R.; Löwen, H. (American Physical Society, 1999-10-04)The dynamics of the freezing transition of the rotator phase crystal of ethanol into its orientational glass phase is ...
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Artículo
Role of low-frequency vibrations on sound propagation in glasses at intermediate temperature
Criado Vega, Alberto; Jiménez Ruiz, M.; Cabrillo, C.; Bermejo, F. J.; Grimsditch, M.; Fischer, H. E.; Bennington, S. M.; Eccleston, R. S. (American Physical Society, 2000)We report measurements of the temperature dependence of the sound attenuation and the fractional change in sound velocity ...
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Artículo
Rotational dynamics in the plastic-crystal phase of ethanol: Relevance for understanding the dynamics during the structural glass transition
Criado Vega, Alberto; Jiménez Ruiz, M.; Cabrillo, C.; Bermejo, F. J.; Fernández Perea, F.; Fischer, H. E.; Trouw, F. R. (American Physical Society, 2000)The reorientational dynamics within the rotationally disordered cubic plastic phase of solid ethanol is investigated by ...
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Artículo
Structure and Absolute Configuration of 4-(a-D-Erythrofuranosyl)-1,3-dihydro-3-methyll-( p-tolyl)-2H-imidazole-2-thione, C 15 H18N2038
Criado Vega, Alberto; Conde Amiano, Alejandro; Márquez Delgado, Rafael (International Union of Crystallography, 1985)M r = 306.4, monoclinic, P21, a = 14.686 (6), b=5.359(4), c=9.439(3) A, fl=98.68(3) ° , V= 734.4 (7)/I,3, Z = 2, D x = ...