title: Dipotassium hydrogencarbonate fluoride monohydrate.
abstract: Single crystals of the title compound, K2(HCO3)F·H2O, were obtained as a secondary product after performing flux synthesis experiments aimed at the preparation of potassium rare earth silicates. The basic building unit of the structure is an [(HCO3)(H2O)F](2-) zigzag chain running parallel to [001]. Both types of anions as well as the water mol-ecules reside on mirror planes perpendicular to [010] at y = 0.25 and y = 0.75, respectively. Linkage between the different constituents of the chains is provided by O-H⋯O and O-H⋯F hydrogen bonding. The K(+) cations are located between the chains and are coordinated by two F and five O atoms in form of a distorted monocapped trigonal prism.
authors: University of Innsbruck, Institute of Mineralogy & Petrography, Innrain 52, A-6020 Innsbruck, Austria.
authors: Volker
authors: V
authors: Kahlenberg
authors: Timo
authors: T
authors: Schwaier
references: Acta Crystallogr B. 2003 Oct;59(Pt 5):596-605
references: 14586079
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677