Abstract
Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a=6.436(3)Ä, b=18.934(9)Ä, c=7.417(5)Ä, beta=96.26(2)?; Z=2. The crystal structure was refined to a conventional R of 0.022 (Rw=0.018).
In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons.
In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.
| Translated title of the contribution | K2Sn4Se8 - A Mixed-Valent Selenostannate |
|---|---|
| Original language | German (Austria) |
| Number of pages | 5 |
| Journal | Zeitschrift für Naturforschung B: A Journal of Chemical Sciences |
| Publication status | Published - Jul 1991 |
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Fields of science
- 103040 Photonics
- 104 Chemistry
- 104003 Inorganic chemistry
- 104008 Catalysis
- 104011 Materials chemistry
- 104015 Organic chemistry
- 104016 Photochemistry
- 104021 Structural chemistry
- 106 Biology
- 106002 Biochemistry
- 106032 Photobiology
- 107002 Bionics
- 209001 Biocatalysis
- 209004 Enzyme technology
- 210002 Nanobiotechnology
- 210005 Nanophotonics
- 211908 Energy research
- 211915 Solar technology
- 301114 Cell biology
- 301305 Medical chemistry
- 301904 Cancer research
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