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Crystal growth and physical properties of l-glutamic acid halides, l-c5H9NO4 · HX (X = Cl, Br, I)

Published/Copyright: August 25, 2010

Abstract

Single crystals of optical quality of l-glutamic acid chloride, bromide and iodide with dimensions up to 80 × 30 × 20 mm have been grown from aqueous solutions by controlled lowering of temperature from 315 to 300 K. The isotypic crystals possess quite similar physical properties. Strong anisotropic effects are found with respect to elastic constants, coefficients of thermal expansion and piezoelectric constants. The dielectric constants show only a very weak anisotropy. The piezoelectric and electrooptic constants are smaller than those of α-quartz.

Published Online: 2010-8-25
Published in Print: 1986-1-1

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