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In a crystalline solid, anions B are arr...

In a crystalline solid, anions B are arranged in a ccp. Cations A are equally distributed between octahedral and tetrahedral voids. If all the octahedral voids are occupied, the formula of the compound is `A_2B//A_3B`.

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To determine the formula of the compound formed by cations A and anions B in a crystalline solid, we can follow these steps: ### Step 1: Determine the arrangement of anions B Anions B are arranged in a cubic close packing (ccp), which is also known as face-centered cubic (fcc). In a ccp structure, there are 4 anions per unit cell. ### Step 2: Calculate the number of voids In a ccp structure, for every n atoms of the anions, there are: - **n octahedral voids** ...
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