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Names | |
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Other names
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Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.033.639 |
EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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Properties | |
Cs2WO4 | |
Molar mass | 513.65 g/mol |
Melting point | >350 °C [1] |
Related compounds | |
Other cations | Lithium tungstate Sodium tungstate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Caesium tungstate or cesium tungstate is an inorganic chemical compound with the formula Cs2WO4. [2] It is notable for forming a very dense liquid in solution (a solution containing 85.6g Cs2WO4 per 100g water has a specific gravity of 3.0133). [3] The solution is used in diamond processing, since diamond sinks in it, whereas most other rocks float. [4]
Caesium tungstate forms colorless crystals, which are strongly hygroscopic. A phase transition from orthorhombic to hexagonal crystal system occurs at 536 °C.
Caesium tungstate can be obtained by the reaction between caesium chloride (CsCl) and silver tungstate (Ag2WO4) or the reaction between tungstic acid and caesium hydroxide.