get_ionic_radius(symb, valence)

Returns the ionic radius (angstroms) of an ion. If an error ocurred, it returns 0.

Parameters:

• symb (str) – atomic symbol

• valence (int) – ion valence

Returns:

ionic radius

Return type:

float

>>> from pycrysfml import cfml_scattering_tables
>>> cfml_scattering_tables.get_covalent_radius('Fe',2)
0.7599999904632568