Questions
In a unit cell, atoms (A) are present at all corner lattices, (B) are present at alternate faces and all edge centers. Atoms (C) are present at face centers left from (B) and one at each body diagonal at distance of 1/4th of body diagonal from corner.
A tetrad axis is passed from the given unit cell and all the atoms touching the axis are removed. The possible formula of the compound left is
detailed solution
Correct option is A
Case I If the tetrad axis passes through the face centres where B lies, thenNumber of B atom =4−12×2=3The formula of the compound left is AB3C6.Case II If the tetrad axis passes through the face centre s where C lies, thenNumber of C atoms =6−12×2=5The formula of the compound left is AB4C5.Similar Questions
Match the following columns.
Column I (Distribution of particles ,A and B) | Column II (Formula) | ||
A | A - At the corners and face centres B - At the edge centres and body centre | 1 | AB3 |
B | A - At the corners B - One on each body diagonal | 2 | AB |
C | A - At the corners B - At face centres | 3 | AB4 |
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