Question:
In a BCC (Body-Centered Cubic) unit cell, what is the coordination number?
In a BCC (Body-Centered Cubic) unit cell, what is the coordination number?
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Common coordination numbers:
SC (Simple Cubic) = 6,
BCC (Body-Centered Cubic) = 8,
FCC (Face-Centered Cubic) = 12.
Updated On: Apr 22, 2026
- \(4\)
- \(6\)
- \(8\)
- \(12\)
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The Correct Option is C
Solution and Explanation
Concept:
The coordination number of a crystal structure is the number of nearest neighboring atoms surrounding a given atom.
Step 1: Understand BCC structure. In a Body-Centered Cubic (BCC) unit cell:
• Atoms are present at the \(8\) corners of the cube.
• One atom is present at the center of the cube.
Step 2: Nearest neighbors of the central atom. The atom at the center is directly surrounded by the \(8\) corner atoms.
Step 3: Determine coordination number. Thus, each atom in a BCC structure has 8 nearest neighbors. \[ \text{Coordination Number} = 8 \]
Step 1: Understand BCC structure. In a Body-Centered Cubic (BCC) unit cell:
• Atoms are present at the \(8\) corners of the cube.
• One atom is present at the center of the cube.
Step 2: Nearest neighbors of the central atom. The atom at the center is directly surrounded by the \(8\) corner atoms.
Step 3: Determine coordination number. Thus, each atom in a BCC structure has 8 nearest neighbors. \[ \text{Coordination Number} = 8 \]
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