Abstract
AbstractThe methodic possibilities of measurements by the Bond‐method for a highly precise determination of the lattice parameters in block structures with small block desorientation angles in the region of angular seconds or angular minutes (LiF crystals) have been examined. The lattice distorsion in two planes perpendicular to the (001) surface of crystalis described. The same planes have also been examined by elastooptic methods. In both planes we got for the lattice parameters: a1 & a2 > a3 (a1 and a2 parallel to the surface of crystal, a3 perpendicular to the surface of crystal); i.e. we could observe a dilatation of the unit cell parallel to the surface of the crystal. Special results concerning the distribution of local lattice parameters along the surface of sample are discussed in connection with the results of elastooptic observations.
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