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, ν2(E), of tne tetrahedral 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 ions occupy sites of symmetry C s; the degeneracy is thereby removed so that all the fundamentals are now allowed.