Thermal expansion, elastic and thermoelastic properties including crystal structure analyses of K-, Rb- and Cs-nitrilotriacetates

Autor(en)
Eiken Haussühl, S Haussühl, Ekkehart Tillmanns
Abstrakt

Single crystals of the title compounds having optical quality and dimensions up to 60 mm have been grown from aqueous solutions. X-ray crystal structure analyses of K2H[N(CH2COO)3] ž H2O (I), K2H[N(CH2COO)3] ž H2O (II), and Cs2H[N(CH2COO)3] ž H2O (III) yielded: Table presented. Thermal expansion, elastic and thermoelastic properties of the title compounds have been measured employing mechanical and optical dilatometers and ultrasonic resonance techniques, respectively. They possess quite different structural motifs contrary to most other salts having a common anion. An anomalous large molecular volume and a small mean elastic stiffness of K2H[N(CH 2COO)3] ž 2 H2O is qualitatively interpreted by the small number of Coulomb interactions between the single charged cations and oxygen atoms of the anions. Differences in thermal and elastic properties of corresponding alkali nitrilotriacetates and alkali salts of other large anions are discussed.

Organisation(en)
Institut für Mineralogie und Kristallographie
Externe Organisation(en)
Universität zu Köln
Journal
Zeitschrift für Kristallographie : international journal for structural, physical, and chemical aspects of crystalline materials
Band
219
Seiten
644-651
Anzahl der Seiten
8
ISSN
0044-2968
Publikationsdatum
2004
Peer-reviewed
Ja
ÖFOS 2012
1051 Geologie, Mineralogie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/b9dfaf75-5147-4420-a7dc-9eb4bfae20c0