Calculation of spherical coordinates of faces after a shift

Abstract

Especially for triclinic crystals, when determining the lattice plane densities of the vertical zone from tables, it is necessary to apply a shift to the defining faces, and such a shift should be made with greater precision, compared with that which we can achieve graphically. In this case, it will be necessary to calculate the spherical coordinate ρ, which defines the faces after the shift. Solving the problem of such calculation does not present any difficulty, and is already partly contained in one of the formulas given in the article by Sokolov and myself “Determination of the lattice plane densities of crystal faces without the help of constructions"

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