Short Note

Draw the following : (1,-1,3) ,(2,0,0) , [0,0,-1]

An electron is accelerated through 1200 volts and is reflected from a crystal. The second order reflection occurs when glancing angle is 60°. Calculate the inter planar spacing of the crystal.

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#### Solution

Ans :- 1. Miller indices :( 1 1 3)

Intercepts :a, -a, a/3

2. Miller indices : (200) …………(can also be written as (100))

Reciprocals : 1, ∞ ,∞

Intercepts : a, ∞ ,∞

Concept: Introduction to Crystallography

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