Values of Single-Bond Metallic Radii

In Chapter 11 there will be given a discussion of the observed interatomic distances in crystals of the metallic elements and an account of the derivation from them of a set of values of single-bond metallic radii. These values are shown in Table 7-18. They refer to single covalent bonds for which the bond orbitals have the same hybrid character as in the metals themselves, as discussed in Chapter 11. The relation bc- 

Use will be made of the single-bond metallic radii in some of the following chapters. 

It is interesting that the difference between the effective radius of manganese in Mnll and the single-bond metallic radius, 0.260 A, is nearly as great as that between the anomalous octahedral manganese radius and the d2 p octahedral radius (Sec. 7-9). It is likely that in MnH the 3d orbitals of the manganese atom are all occupied by electrons and that the bond orbital has very little d character. 

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