Neptunium hexafluoride

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Neptunium hexafluoride[1]
Stereo structural formula of Neptunium hexafluoride
Identifiers
CAS number 14521-05-2 YesY
PubChem 19695135
Jmol-3D images Image 1
Properties
Molecular formula F6Np
Molar mass 351.04 g mol−1
Appearance orange crystals
Melting point 54.4 °C (129.9 °F; 327.5 K)
Boiling point 55.18 °C (131.32 °F; 328.33 K)
Structure
Crystal structure Orthorhombic, oP28
Space group Pnma, No. 62
Coordination
geometry
octahedral (Oh)
Dipole moment 0 D
Related compounds
Related fluoroNeptuniums Neptunium trifluoride

Neptunium tetrafluoride

Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N
Infobox references

Neptunium hexafluoride (NpF6) is the highest fluoride of neptunium. It is an orange volatile crystalline solid.[1] It is relatively hard to handle, being very corrosive and radioactive. It is prepared by fluorination of Neptunium(IV) fluoride (NpF4) by powerful fluorinating agents such as elemental fluorine.[2]

NpF
4
+ F
2
NpF
6

It can also be obtained by fluorination of neptunium(III) fluoride.[3]

2 NpF
3
+ 3 F
2
→ 2 NpF
6

References[edit]

  1. ^ a b Gmelins Handbuch der anorganischen Chemie, System Nr. 71, Transurane, Teil C, p. 108–114.
  2. ^ John G. Malm, Bernard Weinstock, E. Eugene Weaver: „The Preparation and Properties of NpF6; a Comparison with PuF6“, J. Phys. Chem., 1958, 62 (12), p. 1506–1508 (doi:10.1021/j150570a009).
  3. ^ Sherman Fried, Norman Davidson: „The Preparation of Solid Neptunium Compounds“, J. Am. Chem. Soc., 1948, 70 (11), p. 3539–3547 (doi:10.1021/ja01191a003).