Question

What are Miller indices?

(a) Set of three numbers used to indicate the position of a face of a crystal

(b) Set of four numbers used to indicate the position of a face of a crystal

(c) Set of five numbers used to indicate the position of a face of a crystal

(d) Set of six numbers used to indicate the position of a face of a crystal

The question was asked in exam.

My question is taken from Crystal Geometry in section Crystallization of Food Processing Unit Operations

Answer 1

The correct option is (a) Set of three numbers used to indicate the position of a face of a crystal

For explanation: Miller indices are a set of three numbers to indicate the position of a face of a crystal and are determined on the basis of the reciprocal of the intercept of the face on the crystallographic axes.