The Borohydride Ion in the Lithium Borohydride Lattice


IN a recent communication in Nature, Dr. C. J. H. Schutte1 has suggested that the anomalous band occurring at about 1,250 cm.−1 in the paraffin-oil mull spectrum of lithium borohydride at room temperature2 may be assigned to the doubly degenerate frequency, ν̄2(E), of tne tetrahedral BH 4 ion. This frequency is normally inactive in the infra-red, but it is suggested that under the space-group V h of crystalline, orthorhombic lithium borohydride, the BH 4 ions occupy sites of symmetry C s; the degeneracy is thereby removed so that all the fundamentals are now allowed.

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BROWN, D. The Borohydride Ion in the Lithium Borohydride Lattice. Nature 190, 804 (1961).

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