The general formula of an ionic compound crystallizing in zinc-blende structure is

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${AB}_{3}$

${AB}_{2}$

$A_{2} B$

answer is A.

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Detailed Solution

The zinc-blende structure is a type of crystal structure commonly found in some ionic and covalent compounds. In this structure, the cations (positively charged ions) occupy half of the tetrahedral voids within a closely packed arrangement of anions (negatively charged ions).

Ionic Arrangement:
In the zinc-blende formula, each cation is surrounded by four anions in a tetrahedral geometry. Similarly, each anion is surrounded by four cations. This results in a 1:1 stoichiometric ratio of cations to anions.
Compound Examples:
A well-known compound with the zinc-blende formula is ZnS (zinc sulfide). Here, Zn²⁺ ions occupy the tetrahedral voids, and S²⁻ ions form the face-centered cubic (FCC) lattice.
Correct Formula:
Based on this structure, the general formula for a compound crystallizing in the zinc-blende formula is AB. Here:
- "A" represents the cation.
- "B" represents the anion.