# Enum radius_type

- Defined in File atom_type.hpp

## Enum Documentation

enum class cif::radius_type

  An enum used to select the desired radius for an atom. All values are collected from the wikipedia pages on atom radii

  Values:

  enumerator calculated

    Calculated radius from theoretical models.

  enumerator empirical

    Empirically measured covalent radii.

  enumerator covalent_empirical

    Deprecated:

      It is a bit unclear where these values came from. So, better not use them

  enumerator single_bond

    Bond length for a single covalent bond calculated using statistically analysis.

  enumerator double_bond

    Bond length for a double covalent bond calculated using statistically analysis.

  enumerator triple_bond

    Bond length for a triple covalent bond calculated using statistically analysis.

  enumerator van_der_waals

    Radius of an imaginary hard sphere representing the distance of closest approach for another atom.

  enumerator type_count

    Number of radii.