38 research outputs found
Molecular Inclusion in Functionalized Macrocycles. Part 6. The Crystal and Molecular Structures of the Calix[6]arene from p-(1,1,3,3-Tetramethylbutyl)phenol and its 1:1 Complex with Toluene
No full textX-Ray Crystal and Molecular Structure of the p-t-Butylphenol-Formaldehyde Cyclic Octamer Cyclo(octa((5-t-butyl-2-acetoxy-1,3-phneylene)methylene))
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Structural study of zeolite X exchanged with ‘f’ transition elements. II. Crystal structure of hydrated Gd27Na7[88] zeolite X
No full textCrystal and Molecular Structure of Cyclo(quater((5-t-butyl- 2-hydroxy-1,3-phenyl ene)methylene)) Toluene (1:1) Clathrate
No full textStructural study of zeolite X exchanged with ‘f’ transition elements. I. Crystal structure of reference hydrated NaX
No full textX-ray powder diffraction study of the high pressure behaviour of uranium dioxide
No full textUranium dioxide was studied by X-ray powder diffraction under pressure in diamond anvil cells up to 40 GPa. A gradual transition to a low symmetry high pressure phase (UO2 II) occurs in the range 29 to 38 GPa. On pressure release, UO2 II is conserved by hysteresis below 15 GPa, but retransforms completely to fcc UO2 I above 5 GPa. The transformation is likely to be a purely structural one which is not due to delocalization of 5f electrons.Le comportement du bioxyde d'uranium sous des pressions jusqu'à 40 GPa a été étudié par diffraction X sur poudre dans des cellules à enclumes de diamant. L'oxyde cfc se transforme progressivement en UO2 II, phase moins symétrique, entre 29 et 38 GPa. Lorsqu'on diminue la pression, la transformation inverse se fait seulement entre 15 et 5 GPa. Il s'agit probablement d'une transformation purement structurale qui n'est pas liée à une délocalisation d'électrons 5f
X-ray diffraction study of the bonding between sulphur and the elements of group IVB. The crystal and molecular structures of methylthiotriphenyl-methane, -silicon, -germanium, -tin and -lead
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