Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Dominique Weigel"'
Publikováno v:
The Journal of Chemical Physics. 73:438-441
A new low‐temperature phase of ferrocene Fe (C5H5)2, stable below 250 K, has been characterized by means of x‐ray diffraction on powder and differential scanning calorimetry experiments. Lattice of this phase is orthorhombic and its molecular pac
Autor:
Jean-Raymond Gavarri, Dominique Weigel
Publikováno v:
Journal of Solid State Chemistry. 13:252-257
Publikováno v:
Ferroelectrics. 55:135-138
Phase transitions of Pb3V2(1-x)P2xO8 compounds, for x≤0. 5, were investigated by X-ray powder diffraction. Temperature-dependence of acousto-optic properties, for x=0. 15, are discussed in connection with the ferroelastic transition.
Publikováno v:
Journal of Solid State Chemistry. 16:55-62
About 20 X-ray powder diagrams were recorded in the range 30 to 295°K, by means of a prototype diffractometer and a high-efficiency cryostat, so that a very precise study of the anisotropic structural evolution of lead oxide Pb3O4 could be made. The
Publikováno v:
Journal of Solid State Chemistry. 14:91-98
The structure of Pb3O4 at 5 K has been studied from X-ray and neutron powder diffraction patterns. The cell is orthorhombic:a = 9.124A, b = 8.467A,and c = 6.5667A. Twelve coordinates of lead and oxygen atoms have been refined from spacegroupPbam. Fro
Publikováno v:
Journal de Chimie Physique. 64:934-941
Publikováno v:
Journal de Chimie Physique. 69:480-486
Une methode, fondee sur l’enregistrement des diagrammes de diffraction des rayons X par les poudres, a ete mise au point pour determiner tres precisement, entre 94 et 295 K, le tenseur de dilatation thermique des solides cristallises. Cette methode
Publikováno v:
Journal of Solid State Chemistry. 7:222-228
The structure of NiI 2 , 6 H 2 O has been determined by X-ray diffraction techniques. The dimensions of the hexagonal unit cell are: a = 7.638 ± 0.005 A and c = 4.876 ± 0.005 A, with Z = 1. The space group is P 3 m1 . The structure was deduced from
Publikováno v:
Journal de Chimie Physique. 62:125-130
Autor:
Dominique Weigel, Daniel Louër
Publikováno v:
Bulletin de la Société française de Minéralogie et de Cristallographie. 96:340-345
Anhydrous cadmium nitrate Cd (NO₃)₂ has been studied by X-ray diffraction method in the temperature range from 21° C to 316° C. Two phases are characterized ; the phase change is a first-order transformation and has been confirmed by others phy