Published by:
CGP EDU Academic Team
Published on: August 13, 2026
X-ray analysis Mn–Sialloy with 75% by atoms of Mn and 25% by atoms of Si, showed that the unit cell is cubic and lattice parameter is 2.86 Å. The density of alloy = 6850 kg/m3. How many number of atoms are present in the unit cell ?
Mn : 55 and Si : 28
Text Solution
Verified by ExpertsThe correct answer is:
A
Let total no. of atoms present in the unit cell = n
∴ no. of Mn atoms = 
n ; no. of Si atoms = 
∴ 
= 6.85
or 
= 6.85
or n = 
= 1.99 ~ 2
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