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Siegfried Haussühl

Beta-succinic acid, a crystal of extreme elastic properties

Single crystals of monoclinic β-succinic, (CH2)2(COOH)2, possess an extreme anisotropy of the longitudinal elastic stiffness. The maximum of 12.56 x 10¹⁰ Nm^-2 is observed along the hydrogen-bonded infinite chains, the minimum of 0.99 x 10¹⁰ Nm^-2 near a perpendicular direction within the cleavage plane (010). This anisotropy is the largest hitherto found in ionic or molecular crystals. The tensor of thermal expansion exhibits a considerable anisotropy, too, in accordance with the Grueneisen rule.

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 210, 12/1995
Pages: 903

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