The radius of a calcium ion is 94 pm and of the oxide ion is 146 pm. T – InterviewSolution

1.	The radius of a calcium ion is 94 pm and of the oxide ion is 146 pm. The possible crystal structure of calcium oxide will be
Answer» tetrahedral trigonal octahedral pyramidal Solution :As per formula, radius ratio`=("radius of cation")/("radius of anion")` `=(94)/(146)=0.643` Since the value is between 0.414 - 0. 732 hence thecoordination no. will be 6 and GEOMETRY will beoctahedral

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