Date Published: May 01, 2009
Publisher: International Union of Crystallography
Author(s): Safa Ezzine, Mohamed Faouzi Zid, Ahmed Driss.
A new potassium vanadium arsenate, tripotassium trivanadium bis(arsenate) hexaoxide, K3VO2(V2As2O12), was synthesized by a solid-state reaction at 743 K. The structure is built up from VO5 pyramids, VO4 tetrahedra (.m. symmetry) and AsO4 tetrahedra linked together by corner-sharing to form a three-dimensional framework. The two crystallographically independent K+ cations, one of which has .m. symmetry, are located in the interconnected tunnels running along the a and b directions.
For preparative details, see: Hajji & Zid (2006 ▶); Ouerfelli et al. (2007 ▶); Ben Amor et al. (2008 ▶). For structural relationships, see: Haddad & Jouini (1994 ▶); Berrah et al. (1999 ▶). For properties of related compounds, see: Lii & Wang (1989 ▶); Lii et al. (1990 ▶); Haddad et al. (1992 ▶); Aranda et al. (1992 ▶); Berrah et al. (1999 ▶); Amoros et al. (1988 ▶); Leclaire et al. (2002 ▶); Daidouh et al. (1997 ▶); Nguyen & Sleight (1996 ▶). For bond-valence data, see: Brown & Altermatt (1985 ▶).