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Absorption Spectra of Cr III in some lattices of spinel and pseudo‐brookite Type
Author(s) -
Hassanein M.
Publication year - 1974
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19744030314
Subject(s) - brookite , spinel , absorption (acoustics) , spectral line , absorption spectroscopy , crystallography , chemistry , analytical chemistry (journal) , inorganic chemistry , materials science , physics , metallurgy , optics , photocatalysis , biochemistry , astronomy , anatase , composite material , catalysis , chromatography
Spinel mixed crystals ZnCr x Al 2−x O 4 , Cd y Zn 1−y CrAlO 4 , Cd 0.5 Zn 0.5 Cr 0.4 Ga 1.6 O 4 and pseudo‐brookite compounds Al 2−x Ge y Cr x Ti 1−y O 5 were synthesized and x‐rayed. The reflectance spectra were measured. The Δ‐dependent absorption band was shifted towards IR‐region in case of the spinels, whereas it remains nearly unshifted in pseudo‐brookite. Generally, the results are discussed with the help of the ligand field parameters Δ and B.