Chemistry:Titanyl sulfate
TiO2+
[SO 42- ] | |
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| Molar mass | 159.92 g·mol−1 |
| Density | 1.3984 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Titanyl sulfate is the inorganic compound with the formula TiOSO4. It is a white salt that forms by treatment of titanium dioxide with sulfuric acid, either directly or indirectly. It hydrolyzes to a gel of hydrated titanium dioxide. Characteristic of most titanium(IV) compounds with oxygen-containing ligands, the species also includes oxo ligands.[1]
Preparation
A number of methods provide titanium(IV) sulfates. One approach begins with K
2TiO(C
2O
4)
2 · 2H2O, which can be obtained from hydrous titanium(IV) oxides. This salt is treated with hot aqueous sulfuric acid to degrade the oxalate:[2]
- K
2TiO(C
2O
4)
2 · 2H2O + 2 H
2SO
4 → K
2SO
4 + TiOSO
4 + 2 CO + 2 CO
2 + 4 H
2O
Structure
The structure consists of dense polymeric network with tetrahedral sulfur and octahedral titanium centers. The six ligands attached to titanium are derived from four different sulfate moieties and a bridging oxide. A monohydrate is also known, being prepared similarly to the anhydrous material. In the hydrate, one Ti–OS bond is replaced by Ti–OH2.[3]
References
- ↑ Heinz Sibum; Volker Günther; Oskar Roidl; Fathi Habashi; Hans Uwe Wolf (2005). "Ullmann's Encyclopedia of Industrial Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_095.
- ↑ P. Ehrlich (1963). "Titanoxy Sulfate". in G. Brauer. Handbook of Preparative Inorganic Chemistry, 2nd Ed.. 2pages=1228. NY, NY: Academic Press.
- ↑ Gatehouse, B. M.; Platts, S. N.; Williams, T. B. (1993). "Structure of Anhydrous Titanyl Sulfate, Titanyl Sulfate Monohydrate and Prediction of a New Structure". Acta Crystallographica Section B 49 (3): 428–435. doi:10.1107/S010876819201320X. Bibcode: 1993AcCrB..49..428G.
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