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The phases, their lattice parameters and the linear coefficient of the lattice thermal expansion were determined by high‐temperature X‐ray diffraction between room temperature and the melting point for the system (GaxIn1 −x)2Se3 (1 ≥x≥ 0). A wide homogeneity range of zinc blende structure was...
Cell data for monoclinic sebacic acid COOH(CH2)8COOH, C10H18O4, and dodecanedioic acid COOH(CH2)10COOH, C12 H22O4, are accurately given: (C10) a = 15.064 (6), b = 4.987 (4), c = 10.142 (6) A, = 133.14 (5)Degrees; (C12) a = 17.594 (8), b = 4.933 (3), c = 10.174 (5) A, = 132.35 (3)Degrees. It is...
Ordering of carbon atoms in (V1 - xNbx)2C, (Nb1 - xTax)2C and (V1-xTax)2C has been studied by electron diffraction. In addition to three basic structures of V2C (-Fe2N type), Nb2C and Ta2C anti-Cd(OH)2 type, two superstructures are found at intermediate compositions of (V1 - xTax)2C. One of them...
Small‐angle scattering data from polydisperse systems can be evaluated under the assumption that all particles have the same shape and that the size distribution depends only on one linear size parameter R. The shape of the particles is assumed to be known a priori. The corresponding size...
The device described here has been designed to perform microcreep experiments and, simultaneously, to get X‐ray topographic images of the sample. Such dynamic experiments are now possible with white synchrotron radiation (LURE‐DCI Orsay). The sample material, germanium, is hard to machine; so a...
A computer program is described which is suitable for calculating the angular positions of Bragg reflections compatible with a given type of unit cell, taking into account any systematic absences.
Crystal data are given for both and forms of barium dichromate, BaCr2O7. The form is monoclinic (C2/c) with a = 16.29 (5), b = 16.63 (5), c = 9.456 (1) A; = 92.52 (5)Degrees and Z = 16. The form, isotypic with SrCr2O7 and PbCr2O7, is tetragonal (P42/nmc) with a = 11.72 (5), c = 9.440 (3) A and Z...
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