Abstract
The X-ray structural analysis of mono- L-alaninium nitrate has been carried out. The substance crystallizes in an orthorhombic system in the space group P 2 12 12 1, a=5.6627(6), b=7.4705(6), c=16.1420(10) Å, V=682.86(10) Å 3, Z=4, R=0.0394 for 2135 observed reflections. The crystal structure is formed by L-alaninium cations (CH 3CHNH 3 +COOH) and nitrate anions (NO 3 −), connected by a system of hydrogen bonds. The FTIR and FT Raman spectra of natural and deuterated crystals were recorded and interpreted. The FTIR spectra were studied down to a temperature of 90 K. DSC measurements were carried out in the temperature range 95–413 K. No phase transition was found in this temperature range by DSC and FTIR. The possibility of the existence of ferroelectric properties of the mono- L-alaninium nitrate crystals can be excluded for symmetry reasons.
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