Abstract
Electron diffractions from mineral cuprite and single crystals of cuprous oxide, the latter being obtained by oxidizing single crystals of copper at high temperatures, were investigated. In the spot patterns, some spots corresponding to diffractions forbidden from the structure factor were observed, to which an interpretation was given.
Orientations of the oxide single crystals to their mother copper single crystals are determined by the analysis of the spot patterns from the crystals of the both kinds, and three different relative orientations are observed, presence of which is to be attributed to presence of three different modes of transpositions, and is not due to. recrystallizations, of copper atoms in forming the cuprous oxide lattice from the copper lattic.
Lattice constants of both cuprous oxide formed under different conditions and mineral cuprite are determined from the spot patterns, knowing the wave-lengths of electrons from the diffraction rings of magnesium oxide powder, which was precipitatcd on the surfaces of the specimens.
