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The temperature dependence of all elastic constants of cubic Ni(NO3)2.6NH3, measured from the transition point at - 34.2 to 150DegreesC by ultrasonic methods, exhibits KCN-type anomalous behaviour. Within a wide temperature range all elastic wave velocities increase with higher temperature. The...
In order to allow accurate measurement of integrated X-ray intensities in the case of continuous diffractometric recording of -filtered K radiation, a dead-time correction formula is proposed, based on the approximation of diffraction profiles by Cauchy's functions.
Integrated intensities from ground spherical single crystals of silicon, zinc sulphide, and calcium fluoride before and after etching are compared. The surface damage of the unetched crystals, apparent on scanning electron micrographs, is shown to give rise to a very appreciable enhancement of...
The expression for the probability distribution of X-ray intensities is obtained for a non-centrosymmetric crystal possessing an approximate centre of symmetry and from this the acentric and centric distributions of Wilson are deduced as limiting cases. Theoretical expressions for the variance,...
Corrections are given to Acta Cryst. (1973). A29, 717-720.
The resolution function is derived for a two-axis neutron diffractometer in which the monochromator scattering plane is inclined to the specimen scattering plane. The analysis shows that useful results can be obtained from powder diffractometers which operate in the horizontal plane and are...
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