Grade 12Physical Chemistry
Copper exists in face centered cubic lattice with unit cell edge of 361pm . What is the size of the largest atom , which would fit into ocathedral voids without disturbimg the lattice
2 Answers
Sunil Kumar FP
As the copper crystallises in FCC.therefore
edgelength=a=361pm
The radius of copper atom is 4RCu=sqrt2 a=Rcu=sqrt2 a/4=108.3 pm
here the largest size of atom that can be fitted into octahedral void is
2(Rcu +r-)-=a
r-=180.5-108.3 pm=72.2 pm
edgelength=a=361pm
The radius of copper atom is 4RCu=sqrt2 a=Rcu=sqrt2 a/4=108.3 pm
here the largest size of atom that can be fitted into octahedral void is
2(Rcu +r-)-=a
r-=180.5-108.3 pm=72.2 pm
Sunil Kumar FP
Copper exists in face centered cubic lattice with unit cell edge of 361pm . What is the size of the largest atom , which would fit into ocathedral voids without disturbimg the lattice
in the above the radius of Cu=a*sqrt2/4=361*1.414/4=127 pm
therrefore size of largest atom=180.5-127 pm=52.8 pm
in the above the radius of Cu=a*sqrt2/4=361*1.414/4=127 pm
therrefore size of largest atom=180.5-127 pm=52.8 pm
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