![Composite anionic lattices Composite anionic lattices](/2618398/header_image-1448867978.jpg?t=eyJ3aWR0aCI6ODQ4LCJmaWxlX2V4dGVuc2lvbiI6ImpwZyIsIm9ial9pZCI6MjYxODM5OH0%3D--d40d7b28e6fa56a64921674c34d10245ac19c23b)
Composite anionic lattices
The first new materials in this project were obtained using two different synthesis routes. First, by reacting alkaline-earth metal oxides with elemental transition metals and heavier chalcogens, i.e. sulfur, selenium, and tellurium, pure powders were achieved though solid-state reactions. Second, to synthesize single crystals, large enough for structural characterization, two different flux growth methods were used: A self-flux growth method and a flux growth in alkali-metal halide melts.
As all constituents are either moisture sensitive or might oxidize in air, all synthesis steps were performed under inert conditions, either in a glove box with controlled argon atmosphere or in evacuated, closed silica glass vessels.
![Figure 1. A perspective view of the BaFe2S2O structure with extended Fe sublattice to display the ladders. The local Fe coordination is displayed to the right.](/2875118/original-1518447546.jpg?t=eyJ3aWR0aCI6MjQ2LCJvYmpfaWQiOjI4NzUxMTh9--0f3c18470854649fe026a7a3e205d2b25d56e42b)
Figure 1. A perspective view of the BaFe2S2O structure with extended Fe sublattice to display the ladders. The local Fe coordination is displayed to the right.
![Figure 2. (left) The V-S-O lattice in Ba3V2S4O3, emphasizing the charge disproportionation order. (right) The polar VSO3 tetrahedron.](/2875129/original-1518447547.jpg?t=eyJ3aWR0aCI6MjQ2LCJvYmpfaWQiOjI4NzUxMjl9--08ea13c5d2924c7b337b6874b34f79a0b36b2b5b)
Figure 2. (left) The V-S-O lattice in Ba3V2S4O3, emphasizing the charge disproportionation order. (right) The polar VSO3 tetrahedron.
![Figure 3. A perspective view of (left) the BaCoSO crystal structure and (right) the Co-S-O lattice.](/2875140/original-1518447547.jpg?t=eyJ3aWR0aCI6MjQ2LCJvYmpfaWQiOjI4NzUxNDB9--8cf6b181050bfd5a804db0f6ff392e50f379e4e2)
Figure 3. A perspective view of (left) the BaCoSO crystal structure and (right) the Co-S-O lattice.
![Figure 4. (left) The layered crystal structure of CsV2S2O and (right) the trans-octahedral VS4O2 coordination.](/2875151/original-1518447547.jpg?t=eyJ3aWR0aCI6MjQ2LCJvYmpfaWQiOjI4NzUxNTF9--b4257536f5144515298abf2dad4fdb8a2c07543f)
Figure 4. (left) The layered crystal structure of CsV2S2O and (right) the trans-octahedral VS4O2 coordination.