Premium
Crystal growth and physical properties of monoclinic L‐arginine hydrochloride monohydrate, C 6 H 14 O 2 N 4 HCl · H 2 O, and L‐arginine hydrobromide monohydrate, C 6 H 14 O 2 N 4 HBr · H 2 O
Author(s) -
Haussühl S.,
Chrosch J.,
Gnanam F.,
Fiorentini E.,
Recker K.,
Wallrafen F.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250602
Subject(s) - electrostriction , pyroelectricity , refractive index , thermal expansion , dielectric , thermoelastic damping , monoclinic crystal system , anisotropy , crystal (programming language) , materials science , crystallography , optics , chemistry , mineralogy , condensed matter physics , analytical chemistry (journal) , piezoelectricity , crystal structure , thermal , ferroelectricity , composite material , physics , thermodynamics , programming language , optoelectronics , chromatography , computer science
Single crystals of optical quality of L‐arginine HCl · H 2 O and L‐arginine HBr · H 2 O with dimensions up to 80 × 60 × 30 mm have been grown from aqueous solutions by controlled evaporation at about 310 K. The isotypic crystals exhibit a quite similar behaviour with respect to morphological, pyroelectric, dielectric, optical, thermal expansion, electrostrictive, electrooptic, elastic, thermoelastic and non‐linear optical properties. A distinct anisotropy of the longitudinal elastic stiffness is observed with a maximum along the direction of the alignment of the arginine ions. Nearly in the same direction a minimum of thermal expansion, dielectric constant and index of refraction is found. The pyroelectric, electrostrictive, electrooptic and non‐linear‐optical effects are of only mediocre magnitude except the electrostrictive constant d 211 which surmounts the longitudinal electrostrictive constant d 111 of alpha‐quartz by a factor three.