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A revision of van der Waals atomic radii for molecular crystals: N, O, F, S, Cl, Se, Br and I bonded to carbon
The Cambridge Structural Database has been used to determine the effective non-bonding (van der Waals) shapes of N, O, F, S, Cl, Se, Br and I atoms. In all cases these atoms were bonded to a single
Prediction of unit cells and atomic coordinates for the n‐alkanes
b~ trois atomes d'iode, les liaisons Sm-I sont toutes 6gales et ont pour valeur 3,29 A, valeur sup6rieure la somme des rayons ioniques Sm-I. Un atome d'iode est entour6 par trois atomes de samarium,
Structure of the alums. I. On the sulfate group disorder in the α-alums
The crystal structures at room (296 K) and low (173 K) temperature of several α-alums have been refined by single-crystal X-ray structure analysis. Many α-alums of known structure are disordered, the
Crystallography of the even n-alkanes : structure of C20H42
Cristallisation dans P1- avec a = 4,293, b = 4,84 et c = 27,35 A, α = 85,3, β = 68,2 et γ = 72,6 °, Z = 1; affinement jusqu'a R = 0,074. Les alcanes tricliniques pairs jusqu'a n = 22 forment une
Structures of two binary n-alkane solid solutions
From X-ray diffractometer single-crystal data, the structures of two binary n-alkane phases have been determined. (1) β-C 24 H 50 , C 26 H 54 , β-tetracosane-hexacosane, mole fraction of C 24 H 50
Crystallographic and Calorimetric Phase Studies of the n-Eicosane, C20H42: n-Docosane, C22H46 System
Abstract The n-eicosane, C20H42: n-docosane, C22H46 system has been studied by X-ray crystallo-graphic and calorimetric techniques. The phase diagram exhibits no less than six distinct solid phases.
Enthalpy of hydration of the proton
A method is presented for estimating the absolute hydration enthalpy of the proton at infinite dilution and at 298 c- K. The method makes use of a simple model of aqueous solutions, and is based on
`Polar flattening': non-spherical effective shapes of atoms in crystals
An examination of the nearest non-bonded interatomic distances found in crystals shows that where the two atoms are each covalently bound to only one other atom they exhibit non-spherical effective