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- W2043878070 abstract "The absorption spectra and circular dichroism of gallogermanate crystals Ca<SUB>3</SUB>Ga<SUB>2</SUB>Ge<SUB>4</SUB>O<SUB>14</SUB> and Sr<SUB>3</SUB>Ga<SUB>2</SUB>Ge<SUB>4</SUB>O<SUB>14</SUB>, undoped and Cr-doped are investigated. In absorption spectra of all doped crystals three bands connected with ions Cr<SUP>3+</SUP> in octahedral coordination are found. Besides in doped crystals Sr<SUB>3</SUB>Ga<SUB>2</SUB>Ge<SUB>4</SUB>O<SUB>14</SUB> additional low-intensive bands connected apparently with Cr<SUP>4+</SUP> ions in tetrahedral coordination are presented. In circular dichroism (CD) spectra of doped crystals the absorption bands connected to Cr<SUP>3+</SUP> ions are found and the additional ones, which are not connected with Cr<SUP>3+</SUP> ions. Probably these additional bands in CD spectra in both type crystals are connected with defects generating during crystals growth. The rotary forces of transition are determined from CD spectra." @default.
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- W2043878070 date "2001-08-10" @default.
- W2043878070 modified "2023-09-23" @default.
- W2043878070 title "<title>Absorption spectra and circular dichroism of calcium and strontium gallogermanates doped by chromium</title>" @default.
- W2043878070 doi "https://doi.org/10.1117/12.435949" @default.
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