Anion Ordering in Bichalcogenides
This review contains recent developments and new insights in the research on inorganic, crystalline compounds with two different chalcogenide ions (bichalcogenides). Anion ordering is used as a parameter to form structural dimensionalities as well as local- and global-electric polarities. The reason...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-07-01
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| Series: | Inorganics |
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| Online Access: | http://www.mdpi.com/2304-6740/4/3/23 |
| _version_ | 1831646866223136768 |
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| author | Martin Valldor |
| author_facet | Martin Valldor |
| author_sort | Martin Valldor |
| collection | DOAJ |
| description | This review contains recent developments and new insights in the research on inorganic, crystalline compounds with two different chalcogenide ions (bichalcogenides). Anion ordering is used as a parameter to form structural dimensionalities as well as local- and global-electric polarities. The reason for the electric polarity is that, in the heterogeneous bichalcogenide lattice, the individual bond-lengths between cations and anions are different from those in a homogeneous anion lattice. It is also shown that heteroleptic tetrahedral and octahedral coordinations offer a multitude of new crystal fields and coordinations for involved cations. This coordination diversity in bichalcogenides seems to be one way to surpass electro-chemical redox potentials: three oxidation states of a single transition metal can be stabilized, e.g., Ba15V12S34O3. A new type of disproportionation, related to coordination, is presented and results from chemical pressure on the bichalcogenide lattices of (La,Ce)CrS2O, transforming doubly [CrS3/3S2/2O1/1]3− (5+1) into singly [CrS4/2S2/3]7/3− (6+0) and [CrS4/3O2/1]11/3− (4+2) coordinations. Also, magnetic anisotropy is imposed by the anion ordering in BaCoSO, where magnetic interactions via S or O occur along two different crystallographic directions. Further, the potential of the anion lattice is discussed as a parameter for future materials design. |
| first_indexed | 2024-12-19T14:02:42Z |
| format | Article |
| id | doaj.art-718ce3eccf24484c92714d0d97179252 |
| institution | Directory Open Access Journal |
| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-12-19T14:02:42Z |
| publishDate | 2016-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj.art-718ce3eccf24484c92714d0d971792522022-12-21T20:18:24ZengMDPI AGInorganics2304-67402016-07-01432310.3390/inorganics4030023inorganics4030023Anion Ordering in BichalcogenidesMartin Valldor0Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, GermanyThis review contains recent developments and new insights in the research on inorganic, crystalline compounds with two different chalcogenide ions (bichalcogenides). Anion ordering is used as a parameter to form structural dimensionalities as well as local- and global-electric polarities. The reason for the electric polarity is that, in the heterogeneous bichalcogenide lattice, the individual bond-lengths between cations and anions are different from those in a homogeneous anion lattice. It is also shown that heteroleptic tetrahedral and octahedral coordinations offer a multitude of new crystal fields and coordinations for involved cations. This coordination diversity in bichalcogenides seems to be one way to surpass electro-chemical redox potentials: three oxidation states of a single transition metal can be stabilized, e.g., Ba15V12S34O3. A new type of disproportionation, related to coordination, is presented and results from chemical pressure on the bichalcogenide lattices of (La,Ce)CrS2O, transforming doubly [CrS3/3S2/2O1/1]3− (5+1) into singly [CrS4/2S2/3]7/3− (6+0) and [CrS4/3O2/1]11/3− (4+2) coordinations. Also, magnetic anisotropy is imposed by the anion ordering in BaCoSO, where magnetic interactions via S or O occur along two different crystallographic directions. Further, the potential of the anion lattice is discussed as a parameter for future materials design.http://www.mdpi.com/2304-6740/4/3/23anionchalcogenidesuperstructureheteroleptic coordinationcrystal fieldcharge orderingcoordination disproportionationmagnetic anisotropy |
| spellingShingle | Martin Valldor Anion Ordering in Bichalcogenides Inorganics anion chalcogenide superstructure heteroleptic coordination crystal field charge ordering coordination disproportionation magnetic anisotropy |
| title | Anion Ordering in Bichalcogenides |
| title_full | Anion Ordering in Bichalcogenides |
| title_fullStr | Anion Ordering in Bichalcogenides |
| title_full_unstemmed | Anion Ordering in Bichalcogenides |
| title_short | Anion Ordering in Bichalcogenides |
| title_sort | anion ordering in bichalcogenides |
| topic | anion chalcogenide superstructure heteroleptic coordination crystal field charge ordering coordination disproportionation magnetic anisotropy |
| url | http://www.mdpi.com/2304-6740/4/3/23 |
| work_keys_str_mv | AT martinvalldor anionorderinginbichalcogenides |