Unit cells can be classified into primitive and centered unit cells. Differentiate between primitive and centered unit cells?

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Solution

Primitive unit cells
Centered unit cells
They are also called simple cubic unit cells.
They are either called face centered unit cells or body centered unit cells.
Eight atoms are present at eight corners of the unit cell.
In face centered unit cells, eight atoms are present at eight corners of the unit cell. In addition, six atoms are present at six face centers.
In body centered unit cells, eight atoms are present at eight corners of the unit cell. In addition, one atom is present at body center.
Total number of atoms present in one unit cell is 1.
Total number of atoms present in one face centered unit cell is 4. Total number of atoms present in one body centered unit cell is 2.

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Similar questions

Centered unit cells can be classified into how many types?

Primitive unit cells are classified into how many types of crystal systems?

(1) DEFINE THESE IN SHORT

A. CRYSTALLINE SOLID

B. AMOROPHOUS SOLID

C. MOLECULAR SOLID

D. IONIC SOLID

E. METALLIC SOLID

F. COVALENT OR NETWORK SOLID

G. CRYSTAL LATTICE

H. BRAVAIS LATTICE

I. PRIMITIVE UNIT CELL

J. CENTERED UNIT CELL

K. BODY CENTERED UNIT CELL

L. FACE CENTERED UNIT CELL

M. END CENTERED UNIT CELL

The number of atoms per unit cell in a primitive unit cell is:

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Primitive unit cells	Centered unit cells
They are also called simple cubic unit cells.	They are either called face centered unit cells or body centered unit cells.
Eight atoms are present at eight corners of the unit cell.	In face centered unit cells, eight atoms are present at eight corners of the unit cell. In addition, six atoms are present at six face centers. In body centered unit cells, eight atoms are present at eight corners of the unit cell. In addition, one atom is present at body center.
Total number of atoms present in one unit cell is 1.	Total number of atoms present in one face centered unit cell is 4. Total number of atoms present in one body centered unit cell is 2.