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Mostrando ítems 1-10 de 36
Artículo
X-ray Structure and Thermal Motion of Barium N-Dithioearboxylatoglyeinate Trihydrate
(International Union of Crystallography, 1986)
Ba2+.C3H3NO2S2-.3H2 O, Mr=340.6 , triclinic, P1, a = 7.906 (1), b = 7.905 (1), c = 8.000 (1) A, ct= 96.34 (1), fl= 100.08 (1), 7= 93.54 (1)% V= 487.6 (1)A 3, Z- 2, Din= 2.31 (1), D x = 2.320 Mg m -3, 2(Mo Kct) = 0.7107/k, ...
Artículo
Lattice Dynamics and Thermal Crystallographic Parameters in Phenothiazine
(International Union of Crystallography, 1984)
A computer program has been developed to study the lattice dynamics of molecular crystals in the harmonic approximation with the external Born-yon KS.rm~n formalism and an atom-atom potential function. Dispersion curves ...
Artículo
Structure and Molecular-Packing Analysis of a Heptofuranosoimidazolidine-2-Thione
(International Union ofCrystallography, 1987)
1-(4-Bromophenyl)-3-ethyl-(3,5,6,7-tetra-0- acetyl-1,2-dideoxy-n-glycero-P-n-talo-heptofuranoso )- * IUPAC name: 1-{6-acetoxy-3-bromophenyl-2-thioxo-2,3,3a,- 5,6,6a-tetrahydro-1H-furo[2,3-d]imidazol-5-yl ...
Artículo
X-Ray Structure and Molecular-Packing Analysis of Artemetin
(International Union of Crystallography, 1987)
5-Hydroxy-3,3' ,4',6,7-pentamethoxyflavone (flavone is 2-phenyl-4H-1-benzopyran-4-one ), C20H20- 08, M,= 388·4, monoclinic, P2/n, a= 7·518 (4), b=13·625(3), C=17·766(5)Á, P=98·52(3) 0 , V = 1803 (l)Á\ Z=4, Dx= ...
Artículo
Configuración de fisuras en Y-FSZ
(1990)
La microdureza Vickers de monocristales de 4.5 mol % de Y-PSZ ha sido estudiada hasta temperaturas de 1000QC. Se utilizaron dos clases de muestras: brutas de fabricación y sometidas a un tratamiento de recocido (envejecido) ...
Artículo
Lattice-Dynamical Calculation of Second-Order Thermal Diffuse Scattering in Molecular Crystals
(International Union of Crystallography, 1985)
A computer procedure has been developed to calculate second-order thermal diffuse scattering (TDS) intensity for molecular crystals from latticedynamical calculations with an atom-atom potential in the Born-von K~irmfin ...
Artículo
The Structure of l-Phenyl-4,5-(l,2-D-glucofurano)imidazolidin-2-one
(International Union of Crystallography, 1980)
The crystal structure of Cl3Ht6N20 5 has been solved by direct methods. Crystal data are a -- 9.033 (1), b -- 10.097 (1), c -- 7.155 (1)A, fl= 105.92 (1) °, Z -- 2, space group P21 (from statistics). The final R value ...
Artículo
Uso de la espectroscopía Raman en la determinación de fases en Y-PSZ monocristalino
(1991)
Se ha estudiado la estabilidad de la fase tetragonal en monocristales de Zr02 parcialmente estabilizados con 3,4; 4,7 y 6,3% mol de Y2O3 mediante espectroscopia Raman, tratados térmicamente a 1.600ºC hasta 1.000 horas. ...
Artículo
Structure of 4-(~-D-Erythrofuranosyl)-3-methyl- l-(p-tolyl)-4-imidazoline-2-thione Monohydrate, C 15H18N203S.H20
(International Union of Crystallography, 1983)
Mr=324.4, orthorhombic, P212t2 ~, a= 32.150(5), b=10.215(1), c=4.805(1)A, V= 1578.0 (4)/~3, Z = 4, D x = 1.36 Mg m -a, 2(Cu Ka) = 1.5418A, #=1.953mm -1, T=300K, final R= 0.050 for 1361 observed [I>2tr(I)] independent ...
Artículo
Sintering and Characterization Studies of NiO
(EDP Sciences, 1986)
Des polycristaux de NiO de haute pureté ont été élaborés par frittage avec et sans charge. Ils ont été caractérisés par microscopie optique et électronique. Leur comportement en fluage a été étudié au dessus de 1200°C.