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Primitive and Centred Unit Cells

Primitive and Centred Unit Cells. Learning Objectives. After completing this content, you will able: . Understand the Primitive and Centred Unit Cells. Primitive Unit Cells. When constituent particles are present only on the corner positions of

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Primitive and Centred Unit Cells

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  1. Primitive and Centred Unit Cells

  2. Learning Objectives After completing this content, you will able: • Understand the Primitive and Centred Unit Cells.

  3. PrimitiveUnit Cells When constituent particles are present only on the corner positions of a unit cell, it is called as primitive unit cell.

  4. Centred Unit Cells When a unit cell contains one or more constituent particles present at positions other than corners in addition to those at corners, it is called a centred unit cell.

  5. Body-Centred Unit Cells A unit cell contains one constituent particle (atom, molecule or ion) at its body-centre besides the ones that are at its corners.

  6. Face-Centred Unit Cells A unit cell contains one constituent particle present at the centre of each face, besides the ones that are at its corners.

  7. End-Centred Unit Cells In such a unit cell, one constituent particle is present at the centre of any two opposite faces besides the ones present at its corners.

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