In an antiflourite structure, cations occupy

Options

A. octahedral voids
B. centre of cube
C. tetrahedral voids
D. corners of cube

Answer

To solve the question regarding the antifluorite structure, we can break it down into the following steps:

### Step 1: Understand the Antifluorite Structure
The antifluorite structure is a type of crystal structure that is similar to the fluorite structure but has a different arrangement of cations and anions. In this structure, the anions (usually oxide ions) form a face-centered cubic (FCC) lattice.

**Hint:** Remember that the antifluorite structure is characterized by the arrangement of anions and cations.

### Step 2: Identify the Arrangement of Anions
In the antifluorite structure, the anions are arranged in a face-centered cubic (FCC) lattice. This means that the oxide ions occupy the corners and the centers of the faces of the cube.

**Hint:** Visualize the FCC structure to understand where the anions are located.

### Step 3: Determine the Position of Cations
In the antifluorite structure, the cations (metal ions) occupy the tetrahedral voids created by the arrangement of the anions. Tetrahedral voids are the spaces between four anions that form a tetrahedron.

**Hint:** Recall that tetrahedral voids are different from octahedral voids; focus on the tetrahedral arrangement.

### Step 4: Conclude the Answer
Since the question specifically asks where the cations occupy in an antifluorite structure, we conclude that the cations occupy all the tetrahedral voids in the FCC lattice formed by the anions.

**Final Answer:** In an antifluorite structure, cations occupy all the tetrahedral voids.

### Summary of Steps:
1. Understand the antifluorite structure.
2. Identify the arrangement of anions in the FCC lattice.
3. Determine that cations occupy tetrahedral voids.
4. Conclude the answer based on the positions of the cations.