K.asish Subudhi posted an Question
December 20, 2020 • 12:31 pm 30 points
  • IIT JAM
  • Geology (GG)

The radii of a+2 and bions are 1.12a and 1.31a, respectively. the coordination number of a+2 in mineral ab2 is

The radii of A+2 and Bions are 1.12A and 1.31A, respectively. The coordination number of A+2 in mineral AB2 is

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    Saurabh 1 best-answer

    As per radius ratio lies in the range 0.732-1.000 , then Coordination number of A2+ is 8.....So answer is 8 ... Here I'm attaching radius ratio and respective coordination number table.

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    Sajan sarthak best-answer

    radius ratio of cation/Anion= A^+2/B^- (1.12/1.31=0.854) = it comes in (0.731 to 1) so 8 fold coordination. Coordination no= 8

    cropped7430859022044855482.jpg
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