The infra-red absorption spectrum of potassium chlorate crystals: Part I

Abstract

The infra-red transmission through the 001 face of a single crystal of potassium chlorate reveals, besides a broad absorption band in the range 9·2 μ to 12 μ , a second and narrower band with its maximum at 5·3 μ . The former band can be explained as due to the infra-red activity of the vibration frequencies ν₁ (930 cm.^-1) and ν₂ (975 cm.^-1) of the crystal also observed in the Raman effect, and their combinations with the low frequency lattice oscillations. The band at 5·3 μ may likewise be explained as due to the infra-red activity of the octaves of ν₁ and ν₂ and of their summational frequency.