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The smallest portion of the lattice is known as __________

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The smallest portion of the lattice is known as __________

(a) Lattice structure

(b) Lattice point

(c) Bravais crystal

(d) Unit cell

The question was posed to me in exam.

I want to ask this question from Types of Solids, Crystal Structures and Lattices in division Solid Solutions & Crystallography of Engineering Material & Metallurgy

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Correct choice is (d) Unit cell

For explanation I would say: Lattice is defined as the regular geometrical arrangement of points in crystal space. The unit cell is the smallest portion of the lattice, which when repeated in all directions gives rise to a lattice structure.

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