THE RULE OF MUTUAL EXCLUSION AND THE BORN RAMAN CONTROVERSY IN CRYSTALS
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Date
1957
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Publisher
Ohio State University
Abstract
“The following 24 point space groups contain centre of inversion as a symmetry operation: ${C}_{1}$,${C}^{1}_{2{h}}$,${C}^{3}_{2{h}}$,${D}^{1}_{2{h}}$,${D}^{19}_{2{h}}$,${D}^{23}_{2{h}}$,${D}^{25}_{2{h}}$,${C}^{1}_{4{h}}$,${C}^{5}_{4{h}}$,${D}^{1}_{4{h}}$,${D}^{17}_{4{h}}$,${C}^{1}_{3{i}}$, ${C}^{2}_{3{i}}$,${D}^{1}_{3{d}}$,${D}^{3}_{3{d}}$,${D}^{5}_{3{d}}$,${C}^{1}_{4{h}}$,${D}^{1}_{5{i}}$,${T}^{1}_{h}$,${T}^{3}_{h}$,${T}^{3}_{h}$,${O}^{1}_{h}$,${O}^{3}_{h}$,${O}^{9}_{h}$ Crystals belonging to any one of these groups may be studied experimentally whether or not there are any coincidences of spectral lines in Raman effect and infrared absorption. In all these cases, the spectra are mutually exclusive according to Raman’s theory and are not so according to Born’s theory.”
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Author Institution: Andhra University