Thallium(I) fluoride
| Names | |
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Preferred IUPAC name
Thallium(I) fluoride
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| Other names
Thallium monofluoride
Thallous fluoride |
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.231 |
| EC Number | 232-154-1 |
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PubChem CID
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| RTECS number | XG4900000 |
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| Properties | |
| TlF2• | |
| Molar mass | 223.3817 g/mol |
| Appearance | White crystals |
| Density | 8.36 g cm−3 |
| Melting point | 327 °C (621 °F; 600 K) |
| Boiling point | 655 °C (1,211 °F; 928 K) (decomposes) |
| 78.6 g dm−3 (at 15 °C) | |
| Solubility | slightly soluble in ethanol |
| −44.4·10−6 cm3/mol | |
| Structure | |
| Orthorhombic, oP8 | |
| Fmmm, No. 28 | |
| Hazards | |
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EU classification (DSD) (outdated)
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 T+  N
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| R-phrases (outdated) | R26/28, R33, R51/53 |
| S-phrases (outdated) | S13, S28, S45, S61 |
| Related compounds | |
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Other anions
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Thallium(I) chloride |
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Other cations
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Gallium(III) fluoride |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |
Thallium(I) bromide
Thallium(I) iodide
Indium(III) fluoride
Thallium(III) fluoride
Thallium(I) fluoride (or thallous fluoride or thallium monofluoride) is the chemical compound composed of thallium and fluorine with the formula TlF. It consists of hard white orthorhombic crystals which are slightly deliquescent in humid air but revert to the anhydrous form in dry air. It has a distorted sodium chloride (rock salt) crystal structure, due to the 6s2inert pair on Tl+.
Thallium(I) fluoride is unusual among the thallium(I) halides in that it is very soluble in water, while the others are not.
Thallium(I) fluoride can be prepared by the reaction of thallium(I) carbonate with hydrofluoric acid.
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