Protactinium compounds: protactinium tetrachloride

protactinium symbol icon

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

Crystal structure of protactinium tetrachloride

Protactinium tetrachloride

  • Formula as often written: PaCl4
  • Hill system formula: Cl4Pa1
  • CAS registry number: [13867-41-9]
  • Formula weight: 372.847
  • Class: chloride


  • protactinium tetrachloride
  • protactinium(IV) chloride
  • protactinium chloride

Physical properties

  • Colour: green-yellow
  • Appearance:
  • Melting point: sublimes at 400
  • Boiling point:
  • Density: 4.72


Coming soon...

Element analysis

Element percentages for the elements in protactinium tetrachloride
Element %
Cl 38.03
Pa 61.97


Not available

Solid state structure

  • Geometry of protactinium: 8 coordinate: dodecahedral
  • Prototypical structure:

Crystal structure of protactinium tetrachloride

Isotope pattern

What follows is the calculated isotope pattern for the PaCl4 unit with the most intense ion set to 100%.

Formula: Pa1Cl4

mass  %
371  78.2 _______________________________________
372 0.0
373 100.0 __________________________________________________
374 0.0
375 48.0 ________________________
376 0.0
377 10.2 _____
378 0.0
379 0.8


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.

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protactinium atomic number