Question

explain the law of rational indices

Answer 1

The law of rational indices states that the intercepts, OP, OQ, OR, of the natural faces of a crystal form with the unit-cell axes a, b, c (see Fig. 1) are inversely proportional to prime integers, h, k, l. They are called the Miller indices of the face

Answer 2

Explanation:

• The Law of rational intercepts can be defined as the any crystallised face in the space which” can be represented by any “three whole numbers”,

• If the intercept, that made by the unit cell on the three “crystallographic axes” are taken as unit of measurement.

• The intercepts, may be a unit cell on “three crystallographic axes” are referred to as parameters. The parameters are represented by the small letters “a, b and c”.