Correlation of Infra‐Red Spectra with Structural Distortions in the Spinel Series Mg(Cr  x  Al 2− x  )O 4 | Zendy

Grimes N. W. | Zendy; Collett A. J. | Zendy

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Correlation of Infra‐Red Spectra with Structural Distortions in the Spinel Series Mg(Cr x Al 2− x )O 4

Author(s) -

Grimes N. W.,

Collett A. J.

Publication year - 1971

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220430218

Subject(s) - spinel , octahedron , spectral line , tetrahedron , crystallography , chemistry , series (stratigraphy) , formula unit , infrared spectroscopy , absorption (acoustics) , infrared , symmetry (geometry) , oxygen , analytical chemistry (journal) , materials science , physics , crystal structure , geometry , mathematics , optics , geology , paleontology , organic chemistry , chromatography , metallurgy , astronomy

The details of the infra‐red spectra over the range 200 to 1000 cm −1 are presented for eight members of the spinel series Mg(Cr x Al 2− x )O 4 and correlated with the development of local distortions of C 3v symmetry. It is shown that the frequency behaviour of two of the prominent absorption bands is described rather well by the equations given by Waldron for the modes labelled v 1 and v 3 . Force constants k 1 and k 0 , corresponding to unit displacements along the tetrahedral cation‐oxygen and octahedral cation‐oxygen bonds, respectively, are derived in a manner which allows for the presence of other interactions.

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