Zobrazeno 1 - 10
of 133
pro vyhledávání: '"V I, Simonov"'
Publikováno v:
Crystallography Reports. 58:822-828
A new approach to application of diffuse scattering (DS) for studying the defect structure of crystals on laboratory radiation sources is implemented. The basic principles of this approach are as follows: (i) choice of crystals with a high concentrat
Autor:
V. I. Simonov
Publikováno v:
Crystallography Reports. 56:904-909
The occasion of Nikolai Vasil’evich Belov’s 120th birthday is a good reason for recalling the works of this prominent representative of the pleiad of famous Russian and foreign crystallographers. Not only experts in structural crystallography pas
Autor:
V. I. Simonov, Alexander P. Dudka
Publikováno v:
Crystallography Reports. 56:980-985
The atomic displacements upon isomorphic substitutions in crystals of the langasite family have been analyzed. The thermal parameters are determined and the probability density function of atoms is analyzed. Local potential energy minima are found wh
Autor:
V. I. Simonov, T. F. Veremeĭchik
Publikováno v:
Crystallography Reports. 55:976-982
The molecular refractions and characteristics of the circular dichroism spectra of unactivated and chromium_activated La3Ga5.5Ta0.5O14, La3Ga5.5Nb0.5O14, La3Ga5GeO14, La3Ga5SiO14, Sr3Ga2Ge4O14, and Ca3Ga2Ge4O14crystals are compared with their structu
Publikováno v:
Crystallography Reports. 55:1060-1066
An accurate X-ray diffraction study of a La3Ta0.25Zr0.50Ga5.25O14 single crystal (a = 8.2574(4) A, c = 5.1465(4) A, sp. gr. P321, Z = 1, R/Rw = 0.62/0.57% for 4144 unique reflections and 91 parameters) has been performed with a simultaneous neutron d
Publikováno v:
Crystallography Reports. 55:748-752
An accurate X-ray diffraction study of an La3Ta0.25Ga5.25Si0.5O14 single crystal has been performed using two data sets obtained independently for the same sample in different orientations on a diffractometer with a 2D CCD detector. This structure wa
Publikováno v:
Crystallography Reports. 55:342-346
A calculation technique and corresponding algorithms have been developed using the formalism of Fourier transform of finite functions. A software package for obtaining distributions of cluster interatomic vectors from diffuse X-ray scattering has bee
Autor:
V. I. Simonov
Publikováno v:
Journal of Structural Chemistry. 50:66-70
Based on structural studies of SrxBa1-xNb2O6 crystals with different concentrations of strontium and barium, the structural causality of optical nonlinearity of these crystalline materials is established. YAG:Nd laser radiation of the crystals result
Autor:
L. F. Malakhova, N. G. Furmanova, A. I. Vilensky, Alexey E. Voloshin, V. I. Simonov, Elena B. Rudneva, M. S. Grigorieva
Publikováno v:
Crystallography Reports. 54:211-218
The precision X-ray structural investigation of KH2PO4 (KDP) crystal samples from different growth sectors of a single crystal containing chromium impurities is performed. It is demonstrated that the structure of the sample from the prismatic growth
Publikováno v:
Crystallography Reports. 53:573-578
On the basis of precise X-ray diffraction study of lithium niobate single crystals of congruent composition and four zinc-doped (at 2.8, 5.2, 7.6, and 8.2 mol %) crystals, structural conditionality of the threshold concentrations of the dopant has be