If the anions (A) form hexagonal closest packaging and cations (C) occupy only two-third octahedral voids in it, then the general formula of the compound is :
A
CA
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B
CA2
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C
C2A3
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D
C3A2
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Solution
The correct option is CC2A3 In hexagonal closest packaging, the number of octahedral voids is equal to the number of atoms. Therefore the general formula of the compound is C2/3A or C2A3