Follow the appropriate hyperlinks for definitions of each radius type. The problem is its meaning, which is clearly very different in different sources and books. Two values are given here, one is based upon calculations and the other upon observation - follow the appropriate link for further details. This table gives some ionic radii . In this table, geometry refers to the arrangment of the ion's nearest neighbours.
Size does depend upon geometry and environment.
For electronic configurations, where it matters, the values given for octahedral species are low spin unless stated to be high spin. The terms low spin and high spin refer to the electronic configurations of particular geomtries of certain d -block metal ions. Further information is available in inorganic chemistry textbooks, usually at Level 1 or First Year University level. For definitions of ionic radius and further information, follow the hypertext link. Overall, nuclear power stations are more environmentally friendly than coal-fired power stations.