Lithium tungstate
| Identifiers | |
|---|---|
| ECHA InfoCard | 100.033.602 |
| Properties | |
| Li2O4W | |
| Appearance | white solid |
| Density | 4.56 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Lithium tungstate is the inorganic compound with the formula Li2WO4. It is a white solid that is soluble in water. The compound is one of the several ortho tungstates, compounds that feature the tetrahedral WO42- anion.
Structure
The salt consists of tetrahedrally coordinated Li and W centres bridged by oxides. The W-O and Li-O bond distances are 1.79 and 1.96 Å, respectively.[1] The solid undergoes phase transitions at high pressures, such that the coordination geometry at tungsten becomes octahedral (six W-O bonds). For example at 40 kilobars, it adopts a structure related to wolframite.[2]
References
- ^ Zachariasen,W. H; Plettinger,H. A. "The crystal structure of lithium tungstate" Acta Crystallographica 1961, volume 14, pp. 229-30. doi:10.1107/S0365110X61000772
- ^ Horiuchi, Hiroyuki Morimoto, Nobuo; Yamaoka, Shinobu "The crystal structure of lithium tungstate phase (IV) and its relation to the wolframite-type structure" Journal of Solid State Chemistry volume 33, 115-19. doi:10.1016/0022-4596(80)90554-X