NaIn(CrO4)2×2H2O, the first indium(III) member of the kröhnkite family
- Author(s)
- Uwe Kolitsch
- Abstract
Sodium indium(III) chromate(VI) dihydrate, NaIn(CrO4) 2ž2H2O, synthesized from an aqueous solution at room temperature, is the first indium(III) member of the large family of compounds with krošhnkite [Na2CuII(S VIO4)2ž2H2O]-type chains. The crystal structure is based on infinite octahedral-tetrahedral [In(CrO 4)2(H2O)2]- chains along [010], linked via charge-balancing Na+ cations. The slightly distorted InO4(H2O)2 octahedra are characterized by a mean In - O distance of 2.125 A°. The CrO4 tetrahedra are strongly distorted (mean Cr - O = 1.641 A°). The Na atom shows an octahedral coordination, unprecedented among compounds with krošhnkite-type chains. The NaO6 octahedra share opposite edges with the InO4(H2O)2 octahedra to form infinite [001] chains. The hydrogen bonds are of medium strength. NaIn(CrO 4)2ž2H2O belongs to the structural type F2 in the classification of Fleck, Kolitsch & Hertweck [Z. Kristallogr. (2002), 217, 435-443], and is isotypic with KAl(CrO4) 2ž2H2O and MFe(CrO4)2ž 2H2O (M = K, Tl or NH4). All atoms are in special positions except one O atom. Œ 2006 International Union of Crystallography.
- Organisation(s)
- Department of Mineralogy and Crystallography
- Journal
- Acta Crystallographica. Section C: Crystal Structure Communications
- Volume
- 62
- Pages
- 35-37
- No. of pages
- 3
- ISSN
- 0108-2701
- Publication date
- 2006
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105113 Crystallography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6dc81970-89aa-4fa6-b98b-5fbb65b2157d