Table 3: Values of the covalent radii for Cu, In and Ta.

Cation Covalent radius [Å]
Ref [42] Ref [43] Ref [44] Ref [45] Ref [46]
Cu 1.17 1.38 1.38 1.17 1.12
In 1.44 1.44 1.44 1.50 1.42
Ta 1.34 1.38 1.45 1.34 1.46