Solid State Question 201

Question: For an ionic crystal of the general formula $ AX $ and coordination number 6, the value of radius ratio will be

[MP PMT 1993]

Options:

A) Greater than 0.73

B) In between 0.73 and 0.41

C) In between 0.41 and 0.22

D) Less than 0.22

Show Answer

Answer:

Correct Answer: B

Solution:

The structural arrangement of co-ordination number -6- is octahedral and its radius ratio is $ 0.414-0.732 $ . The example of octahedral is $ KCl $ and $ NaCl $ .