Calcium crystallises in a face `-` centred cubic unit cell with `a=556nm`. Calculate the density if it contained `0.1%` Vaccancy defects.

Calcium crystallises in a face `-` centred cubic unit cell with `a=556

1.	Calcium crystallises in a face `-` centred cubic unit cell with `a=556nm`. Calculate the density if it contained `0.1%` Vaccancy defects.
Answer» (i) Frenkel defect does not alter the density of solid. `d=(MZ)/(a^(3)N)=(40xx4)/((0.556xx10^(-7))^(3)xx6.023xx10^(23)` `=1.5455g//cm^(3)` (ii) Shottky defect lowers the density of solid `Z=4=(4xx0.1)/(100)=3.996` `d=(40xx3.996)/((0.556xx10^(-7))^(3)xx6.023xx10^(23)` `=1.5455g//cm^(3)`

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Calcium crystallises in a face `-` centred cubic unit cell with `a=556nm`. Calculate the density if it contained `0.1%` Vaccancy defects.

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