COMPARATIVE CRYSTAL CHEMISTRY, SYMMETRY FEATURES, AND STRUCTURAL COMPLEXITY OF LiOH, NaOH, RbOH, CsOH, AND TlOH HYDROXIDES

We consider the structural features and symmetry of alkali metal (Li, Na, K, Rb, Cs) and thallium hydroxides crystallizing in LiOH, α-NaOH, β-NaOH, TlOH structure types. The complexities of crystal structures are calculated. The structure of these compounds is based on the alternation of dense layer...

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Bibliographic Details
Published in:Journal of structural chemistry 2022-12, Vol.63 (12), p.2054-2067
Main Authors: Yamnova, N. A., Banaru, D. A., Banaru, A. M., Aksenov, S. M.
Format: Article
Language:English
Subjects:
Atomic
Atomic/Molecular Structure and Spectra
Bonding strength
Chemistry
Chemistry and Materials Science
Hydroxides
Inorganic Chemistry
Interlayers
Molecular
Optical and Plasma Physics
Order disorder
Physical Chemistry
Sodium hydroxide
Solid State Physics
Symmetry
Thallium
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Summary:We consider the structural features and symmetry of alkali metal (Li, Na, K, Rb, Cs) and thallium hydroxides crystallizing in LiOH, α-NaOH, β-NaOH, TlOH structure types. The complexities of crystal structures are calculated. The structure of these compounds is based on the alternation of dense layers with strong metal–oxygen bonds and the interlayer space. The common features of hydroxide structures is the location of atoms at square network nodes. Atoms are bound the networks by both true symmetry elements of space groups and additional pseudo-symmetry elements, which indicates the order-disorder (OD) character of hydroxide structures. The arrangement of atoms by the square network pattern allows the consideration of these compounds as a uniform group whose structures retain the tetragonal character of the initial LiOH structure, which is expressed in the similarity of horizontal parameters of their unit cells.
ISSN:0022-4766
1573-8779
DOI:10.1134/S0022476622120174