Question

how many atoms per unit cell are there in end centre orthorhombic crystal​

Answer 1

Answer:

It has unit cell vectors a =b =c and interaxial angles α=β=γ=90°. The simplest crystal structures are those in which there is only a single atom at each lattice point. In the fcc structures the spheres fill 74 % of the volume. The number of atoms in a unit cell is four (8×1/8 + 6×1/2 = 4).

Explanation:

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Answer 2

Answer:

Face-centred Cubic Unit Cell

Therefore only half atom belongs to a single unit cell. In end-centred cubic unit cell, 8 atoms are located on 8 corners of the cube and 1 atom each is present on two opposite faces of the cube.

Explanation:

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