Question

16. What is radius ratio rule ? How it is related to co-
ordination number and geometry of crystals?
(त्रिज्या अनुपात नियम क्या है ? यह समन्वयन संख्या एवं
क्रिस्टल के आकार से कैसे संबंधित है ?)
11​

Answer 1

Answer:

It is the ratio of ionic radius of cation and ionic radius of anion in a cation anion compound.

Radius ratio= Radius of cation/Radius of anion.

Greater the radius ratio larger the size of cation hence the coordination number