WebElements Periodic Table of the Elements | Hafnium

Hafnium compounds: hafnium tetrachloride

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

Hafnium tetrachloride

Formula as often written: HfCl₄
Hill system formula: Cl₄Hf₁
CAS registry number: [13499-05-3]
Formula weight: 320.301
Class: chloride

Synonyms

hafnium tetrachloride
hafnium(IV) chloride
hafnium chloride

Physical properties

Colour: white
Appearance: crystalline solid
Melting point: 432°C (triple point)
Boiling point:
Density:

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Element analysis

Element percentages for the elements in hafnium tetrachloride
Element	%
Cl	44.27
Hf	55.73

Synthesis

Not available

Solid state structure

Geometry of hafnium:
Prototypical structure:

Crystal structure of hafnium tetrachloride

Isotope pattern

What follows is the calculated isotope pattern for the HfCl₄ unit with the most intense ion set to 100%.

Formula: Hf₁Cl₄

mass  %
314   0.2 
315   0.0 
316   7.4 ____
317  25.4 _____________
318  46.5 _______________________
319  51.1 __________________________
320 100.0 __________________________________________________
321  39.4 ____________________
322  85.1 ___________________________________________
323  14.7 _______
324  34.4 _________________
325   2.7 _
326   6.7 ___
327   0.2 
328   0.5

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.