Crystal structure of potassium orthoselenate(IV), K2SeO3

Ralf Albrecht; Thomas Doert; Michael Ruck

doi:10.1107/S2056989022005175

Crystal structure of potassium orthoselenate(IV), K₂SeO₃

Acta Crystallogr E Crystallogr Commun. 2022 May 17;78(Pt 6):615-618. doi: 10.1107/S2056989022005175. eCollection 2022 Jun 1.

Authors

Ralf Albrecht¹, Thomas Doert¹, Michael Ruck^{1

2}

Affiliations

¹ Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01062 Dresden, Germany.
² Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden, Germany.

Abstract

Crystal structure data for potassium orthoselenate(IV), K₂SeO₃, are reported for the first time. Colorless, block-shaped crystals were grown in a potassium hydro-flux, i.e. under ultra-alkaline conditions, within 10 h. K₂SeO₃ crystallizes isostructural with Na₂SO₃ and K₂TeO₃ in the trigonal space group P with lattice parameters a = 6.1063 (4) Å and c = 6.9242 (4) Å at 100 (1) K. In the trigonal-pyramidal, C _3v-symmetric [SeO₃]^2- anion, the bond length is 1.687 (1) Å, and the bond angle is 103.0 (1)°. Two of the three unique potassium cations exhibit a coordination number of six, and the third a coordination number of nine.

Keywords: crystal structure; hydroflux; selenate(IV).

Grants and funding

Funding for this research was provided by: Deutsche Forschungsgemeinschaft (grant No. 438795198).