Crystal structure of langbeinite-related Rb0.743K0.845Co0.293Ti1.707(PO4)3

Nataliia Yu Strutynska; Marina A Bondarenko; Ivan V Ogorodnyk; Vyacheslav N Baumer; Nikolay S Slobodyanik

doi:10.1107/S2056989015001826

Crystal structure of langbeinite-related Rb0.743K0.845Co0.293Ti1.707(PO4)3

Acta Crystallogr E Crystallogr Commun. 2015 Feb 7;71(Pt 3):251-3. doi: 10.1107/S2056989015001826. eCollection 2015 Mar 1.

Authors

Nataliia Yu Strutynska¹, Marina A Bondarenko¹, Ivan V Ogorodnyk¹, Vyacheslav N Baumer², Nikolay S Slobodyanik¹

Affiliations

¹ Department of Inorganic Chemistry, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Str., 01601 Kyiv, Ukraine.
² STC "Institute for Single Crystals", NAS of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine ; V. N. Karazin National University, 4, Svobody Square, 61001 Kharkiv, Ukraine.

Abstract

Potassium rubidium cobalt(II)/titanium(IV) tris-(orthophosphate), Rb0.743K0.845Co0.293Ti1.707(PO4)3, has been obtained using a high-temperature crystallization method. The obtained compound has a langbeinite-type structure. The three-dimensional framework is built up from mixed-occupied (Co/Ti(IV))O6 octa-hedra (point group symmetry .3.) and PO4 tetra-hedra. The K(+) and Rb(+) cations are statistically distributed over two distinct sites (both with site symmetry .3.) in the large cavities of the framework. They are surrounded by 12 O atoms.

Keywords: crystal structure; high-temperature crystallization; langbeinite-type structure; three-dimensional framework.