1. The complex phosphate K0.92In0.46Nb0.54OPO4: a new representative of the KTiOPO4 family.
- Author
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Babaryk, Artem A., Zatovsky, Igor V., Baumer, Vyacheslav N., Slobodyanik, Nikolay S., and Domasevitch, Konstantin V.
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PHYSICAL & theoretical chemistry , *SEPARATION (Technology) , *INTERMEDIATES (Chemistry) , *UNDERGROUND construction , *ANALYTICAL chemistry , *SOLUTION (Chemistry) - Abstract
Aliovalent K0.92In0.46Nb0.54OPO4 (KINP, potassium indium niobium oxide phosphate) features a chain structure involving corner-sharing [ MO6] octahedra ( M = In/Nb), which allows this compound to be recognized as a member of the KTiOPO4 (KTP) family. However, its crystallization in the polar space group P41 belonging to the 4/ m Laue group generates its own subclass of KTP-related compounds. The unit cell contains 18 symmetry-independent atoms occupying general positions. The cis– cis principle of octahedral arrangement is observed for each of the separate [ MO6]∞ chains. The observed variations in the cis– cis linkage are critically important for nonlinear optical properties and distinguish the present compound from other KTP-related structures. The anionic framework adopts one-dimensional tunnels running orthogonal to the ab plane. The K+ ions are arranged in the [001] direction at a distance of c. Merohedral twinning was detected during the structure refinement. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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