WebElements Periodic Table of the Elements | Hafnium

Hafnium compounds: hafnium tetraiodide

The hafnium in hafnium tetraiodide formally is in the oxidation state 4.

Hafnium tetraiodide

Formula as often written: HfI₄
Hill system formula: Hf₁I₄
CAS registry number: [13777-23-6]
Formula weight: 686.108
Class: iodide

Synonyms

hafnium tetraiodide
hafnium(IV) iodide
hafnium iodide

Physical properties

Colour: yellow-orange
Appearance: crystalline solid
Melting point: 449°C (triple point)
Boiling point: 400°C
Density: 5600 kg m^-3

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Element analysis

Element percentages for the elements in hafnium tetraiodide
Element	%
Hf	26.01
I	73.99

Synthesis

Not available

Solid state structure

Geometry of hafnium:
Prototypical structure:

Crystal structure of hafnium tetraiodide

Isotope pattern

What follows is the calculated isotope pattern for the HfI₄ unit with the most intense ion set to 100%.

Formula: Hf₁I₄

mass  %
682   0.5 
683   0.0 
684  14.8 _______
685  53.0 __________________________
686  77.8 _______________________________________
687  38.8 ___________________
688 100.0 __________________________________________________

References

The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.