X-ray crystallography reveals many aspects of the structure of metal halldes. The radius ratio (r_(+)//r_(-)) is a useful parameter to rationalize their structure and stability. A table or radius ratio (r_(+)//r_(-)) for some alkali halide is given below :For a given anion, the graph for NaCl type structure levels off at low r_(+)//r_(-) values because of :

X-ray crystallography reveals many aspects of the structure of metal h

1.	X-ray crystallography reveals many aspects of the structure of metal halldes. The radius ratio (r_(+)//r_(-)) is a useful parameter to rationalize their structure and stability. A table or radius ratio (r_(+)//r_(-)) for some alkali halide is given below :For a given anion, the graph for NaCl type structure levels off at low r_(+)//r_(-) values because of :
Answer» cation - cation CONTACT ALONG the face DIAGONAL anion - anion contact along the face diagonal cation - anion contact along the CELL EDGE None of the above Answer :B