Optical properties of trivalent chromium ions in the LiNbO3 crystal

Correlation of the magnetic and transport properties with polymorphic transitions in bismuth pyrostannate Bi2(Sn1 − x Cr x )2O7

“…When embedding in the niobium octahedron, the Cr 3+ ion causes its deformation, which can occur in two ways [17]: (i) with a change in the positions of the oxygen ions near the immobile Cr 3+ ion and (ii) as a result of the displacement of the Cr 3+ ion from the Nb 5+ site toward the center of the octahedron. In [16], the experimental and theoretical data confirmed the deformation of the niobium octahedron due to the embedding of a trivalent chromium ion in it.…”

“…2b) (1) before high temperature measurements and (2) after high temperature measurements. over the mass numbers of oxygen containing ions (16,17,18,32), no change in the signal intensity was detected.…”

“…There fore, we can assume that, in our sample, Cr 3+ ions sub stitute for tin ions. Chromium ions in the trivalent state were observed in LiNdO 3 crystals [16]. When embedding in the niobium octahedron, the Cr 3+ ion causes its deformation, which can occur in two ways [17]: (i) with a change in the positions of the oxygen ions near the immobile Cr 3+ ion and (ii) as a result of the displacement of the Cr 3+ ion from the Nb 5+ site toward the center of the octahedron.…”