-fluorid.png) | |
| Names | |
|---|---|
| IUPAC names Hafnium(IV) fluoride Hafnium tetrafluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.033.856 |
| EC Number |
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| Properties | |
| HfF4 | |
| Appearance | white crystalline powder |
| Density | 7.1 g/cm3[1] |
| Boiling point | 970 °C (1,780 °F; 1,240 K) (sublimes)[1] |
| Structure | |
| Monoclinic,mS60[2] | |
| C2/c, No. 15 | |
a = 1.17 nm,b = 0.986 nm,c = 0.764 nm | |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
Otheranions | Hafnium(IV) chloride |
Othercations | Titanium(IV) fluoride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Hafnium tetrafluoride is theinorganic compound with the formula HfF4. It is a white solid. It adopts the same structure aszirconium tetrafluoride, with 8-coordinate Hf(IV) centers.
Hafnium tetrafluoride forms a trihydrate, which has a polymeric structure consisting of octahedral Hf center, described as(μ−F)2[HfF2(H20)2]n(H2O)n and onewater of crystallization. In a rare case where the chemistry of Hf and Zr differ, the trihydrate of zirconium(IV) fluoride has a molecular structure(μ−F)2[ZrF3(H20)3]2, without the lattice water.[3]
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