However, although X-ray crystallography gives the distance between ions, it doesn't indicate where the boundary is between those ions, so it doesn't directly give ionic radii.
Namun, meski kristalografi sinar-X memberi gambaran jarak antar ion, ia tidak menunjukkan letak batasnya di antara ion-ion tersebut, sehingga tidak secara langsung memberikan jari-jari ion.