Homogeneous nucleation rate measurements of 1-butanol in helium: A comparative study of a thermal diffusion cloud chamber and a laminar flow diffusion chamber Stable stratification alteration in a thermal diffusion cloud chamber

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538.913.405 Oscillation frequencies of tetragonal ZnP 2 and CdP 2 crystal lattices are calculated for the Keating model. Results of numerical calculations of the phonon spectra in the most symmetric directions and at points of the Brillouin zones are presented. The calculated function of phonon frequency distribution is used to calculate the thermal capacity of CdP 2 .The ZnP 2 and CdP 2 anisotropic crystals belong to the large II-V group semiconductor compounds promising for applications in electronic engineering [1]. These crystals have natural optical activity (birefringence and rotation of the polarization plane) and are characterized by mechanical and optical stability.Cadmium diphosphide and one of the zinc diphosphide modifications (red α-ZnP 2 ) crystallize in tetragonal system with the 4 4

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