Tellurium hexafluoride

Tellurium hexafluoride
Structure and dimensions of the molecule
Structure and dimensions of the molecule
Ball-and-stick model of the molelcule
Ball-and-stick model of the molelcule
Identifiers
3D model (JSmol)
ECHA InfoCard 100.029.115 Edit this at Wikidata
EC Number
  • 232-027-0
UNII
  • InChI=1S/F6Te/c1-7(2,3,4,5)6
  • F[Te](F)(F)(F)(F)F
Properties
TeF6
Molar mass 241.590 g/mol
Appearance colorless gas
Odor repulsive odor
Density 0.0106 g/cm3 (-10 °C)
4.006 g/cm3 (-191 °C)
Melting point −38.9 °C (−38.0 °F; 234.2 K)[2]
Boiling point −37.6 °C (−35.7 °F; 235.6 K)[2]
decomposes
Vapor pressure >1 atm (20°C)[1]
−66.0·10−6 cm3/mol
1.0009
Structure
Orthorhombic, oP28
Pnma, No. 62
octahedral (Oh)
0
Thermochemistry
117.6 J/(mol K)
-1318 kJ/mol
Hazards
Lethal dose or concentration (LD, LC):
5 ppm (rat, 4 hr)
5 ppm (mouse, 1 hr)
5 ppm (rabbit, 4 hr)
5 ppm (guinea pig, 4 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 0.02 ppm (0.2 mg/m3)[1]
REL (Recommended)
TWA 0.02 ppm (0.2 mg/m3)[1]
IDLH (Immediate danger)
1 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tellurium hexafluoride is the inorganic compound of tellurium and fluorine with the chemical formula TeF6. It is a colorless, highly toxic gas with an unpleasant odor.[4]

  1. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0588". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b CRC Handbook of Chemistry and Physics, 90. Auflage, CRC Press, Boca Raton, Florida, 2009, ISBN 978-1-4200-9084-0, Section 4, Physical Constants of Inorganic Compounds, p. 4-95.
  3. ^ "Tellurium hexafluoride (as Te)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ W. Kwasnik (1963). "Tellurium Hexafluoride". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. p. 180.