Tellurium hexafluoride
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| Identifiers | |||
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3D model (JSmol) |
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| ECHA InfoCard | 100.029.115 | ||
| EC Number |
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PubChem CID |
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| UNII | |||
CompTox Dashboard (EPA) |
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| Properties | |||
| TeF6 | |||
| Molar mass | 241.590 g/mol | ||
| Appearance | colorless gas | ||
| Odor | repulsive | ||
| Density | 0.0106 g/cm3 (-10 °C) 4.006 g/cm3 (-191 °C) | ||
| Melting point | −38.9 °C (−38.0 °F; 234.2 K) | ||
| Boiling point | −37.6 °C (−35.7 °F; 235.6 K) | ||
| decomposes | |||
| Vapor pressure | >1 atm (20°C) | ||
| −66.0·10−6 cm3/mol | |||
Refractive index (nD) |
1.0009 | ||
| Structure | |||
| Orthorhombic, oP28 | |||
| Pnma, No. 62 | |||
| octahedral (Oh) | |||
| 0 | |||
| Thermochemistry | |||
Heat capacity (C) |
117.6 J/(mol K) | ||
Std enthalpy of formation (ΔfH⦵298) |
−1318 kJ/mol | ||
| Hazards | |||
| Lethal dose or concentration (LD, LC): | |||
LCLo (lowest published) |
5 ppm (rat, 4 hr) 5 ppm (mouse, 1 hr) 5 ppm (rabbit, 4 hr) 5 ppm (guinea pig, 4 hr) | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible) |
TWA 0.02 ppm (0.2 mg/m3) | ||
REL (Recommended) |
TWA 0.02 ppm (0.2 mg/m3) | ||
IDLH (Immediate danger) |
1 ppm | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
Tellurium hexafluoride is the inorganic compound of tellurium and fluorine with the chemical formula TeF6. It is a colorless and highly toxic gas with an unpleasant odor.