<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi></mml:math>-orbital theory and high-pressure effects upon the EPR spectrum of ruby

Abstract

At the present time there is no satisfactory theory of $d\ensuremath{-}d$ transition in ruby which relates its spectrum to its crystalline parameters; consequently a theoretical problem of predicting high-pressure EPR effects seems far from solution. In the present paper a quantitative relationship between crystalline parameters and spectra is established. The calculation results agree well with experimental findings.