Abstract
The isostructural compounds RbFe2Se3, RbFe2Te3, CsFe2Se3 and CsFe2Te3 were obtained as coarse lustrous crystals by reacting Fe, Se or Te and the corresponding alkali monochalcogenide. They are orthorhombic, oC24, space group Cmcm, Z=4, with a=9.507(3)Ä, b=11.583(4)Ä, c=5.638(2)Ä (RbFe2Se3); a=10.126(9)Ä, b=12.486(7)Ä, c=5.921(1)Ä (RbFe2Te3); a=9.834(5)Ä, b=11.828(6)Ä, c=5.673(2)Ä (CsFe2Se3); a=10.438(4)Ä, b=12.501(6)Ä, c=5.958(2)Ä (CsFe2Te3).
The crystal structures of RbFe2Se3, RbFe2Te3 and CsFe2Se3 were determined by single crystal diffractometer data and refined to conventional R-values of 0.043, 0.042 and 0.082 respectively. Isotypy of CsFe2Te3 was established from its powder diagram.
The title compounds are isostructural with rasvumite, KFe2S3. Their crystal structures are characterized by infinite double chains of edge-sharing iron-centred chalcogen tetrahedra running parallel to [001]. The mean Fe-Se bond lengths are close to 2.39Ä. the mean Fe-Te bond length in RbFe2Te3 is 2.57Ä. The shortest Fe-Fe distances range from 2.765(5)Ä in the selenides to 2.821(4)Ä in RbFe2Te3.
| Original language | English |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Journal of Alloys and Compounds |
| Volume | 238 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 01 May 1996 |
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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