Sample Questions on Bravais Lattice

Question 1: Identify the types of Bravais lattice for the below crystal structures:

(i) Iron(Fe) (ii) Diamond

Answer:

(i) Iron (Fe): Body-Centered Cubic (BCC)

(ii) Diamond: Face-Centered Cubic (FCC)

Question 2: Write the angles between faces for following Lattice system:

(a) Hexagonal Lattice System (b) Tetragonal Lattice System

Answer:

(a) Hexagonal Lattice System: a= 120°, b= c= 90°

(b) Tetragonal Lattice System: a = b= c = 90°

Question 3: Choose the correct lattice type of rhombohedral lattice system:

(a) BCC (b) Primitive (c) Edge-centered

Answer:

The correct lattice type of rhombohedral lattice system is (b) Primitive.

Question 4: Choose the correct edge length of monoclinic lattice system:

(a) x ≠ y ≠ z (b) x = y ≠ z (c) x=y ≠ z

Answer:

The correct edge length of monoclinic lattice system is (b) x = y ≠ z.

Question 5: Identify the Bravais Lattice that shows each of the following descriptions:

a) A lattice where points are located only at the corners of a cube.

b) A lattice with points at the corners and center of each face of a cube.

c) A lattice with points on the edges of a cube, but not on the faces or center.

Answer:

a) A lattice where points are located only at the corners of a cube= Simple Cubic

b) A lattice with points at the corners and center of each face of a cube= Face-Centered Cubic (FCC)

c) A lattice with points on the edges of a cube, but not on the faces or center= Body-Centered Cubic (BCC)

Bravais lattice is a framework in which the points or atoms are arranged in a three-dimensional configuration. Bravais Lattice is named after Auguste Bravais. There are a total of 14 Bravais Lattices across 7 Crystal Systems. This helps us to understand the structure of the particles within a crystal.

In this article, we’ll explore the world of Bravais lattices. Let’s dive deep to learn the definition of bravais lattice, its types, unit cells & lattice systems while solving some great examples.