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Q)C o m p u t e space t h e space l i m i t i n g space r a d i u s space r a t i o space r to the power of plus over r to the power of minus space f o r space a n space e q u i l a t e r a l space t r i a n g u l a r space c r y s t a l space s t r u c t u r e space w i t h space B to the power of minus space a t space t h e space a p e x space a n d space A to the power of plus space a t space t h e space c e n t r e.

Asked by tirumalasandeep 6th April 2017, 4:55 PM
Answered by Expert
Answer:
Dear tirumalasandeep@yahoo.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

For each coordination number (CN), there is a limiting radius ratio that describes the condition that describes the condition of closest packing.
For a equilateral triangular crystal structure with B- at the apex and A+ at the centre, the CN is 3.
For CN = 3, the limiting radius ratio is 0.155.
For CN = 4, it is 0.225.
The limiting radius ratio is the radius ratio at which the coordinating anions just touch.
 

Regards

Topperlearning Team.
Answered by Expert 7th April 2017, 6:40 PM
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