Ionic radii (Shannon) for tetrahedral M(IV) ion



These are Shannon ionic radii.

image showing Ionic radii (Shannon) for tetrahedral M(IV) ion: cityscape periodic periodicity in a cityscape style for the chemical elements


The "efective ionic radii" quoted here assume that the ionic radius of F- is 133 pm and that of O2- is 140 pm. Values depend upon the coordination number and for d-block metals whether or not the metal is in a high or low spin state.

Older "crystal ionic radii" are based upon a radius of six-coordinate F- = 119 pm and are 14-18% larger than effective ioinc radii.

Literature sources

  1. R.D. Shannon, Acta Cryst., 1976, A32, 751.
  2. R.D. Shannon and C.T. Prewitt, Acta Cryst., 1969, B25, 925.
  3. R.D. Shannon and C.T. Prewitt, Acta Cryst., 1970, B26, 1046.
  4. J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.

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