What would be percentage packing efficiency of the smaller cubes, formed within a F.C.C arrangement by joining centres of the tetrahedral voids?
Answers
New, tetrahedral voids will be at corners of the cube .
Effective number of tetrahedral voids =8× 1/8 = 1
Octahedral void will be at body center.
Total octahedral voids =1
So, answer is 1 full Tetrahedral void, 1 full Octahedral void
percentage packing efficiency of the smaller cubes, formed within a F.C.C arrangement by joining centres of the tetrahedral voids is 1 full Tetrahedral void, 1 full Octahedral void
Explanation:
1.tetrahedral voids will be at corners of the cube .Effective number of tetrahedral voids =8 x 1/8 = 1.Octahedral void will be at body center.Total octahedral voids =1. Therefore, 1 full Tetrahedral void, 1 full Octahedral void
2.Face-centered cubic (FCC or cF) is the name given to a type of atom arrangement found in nature.
3.A face-centered cubic unit cell structure consists of atoms arranged in a cube where each corner of the cube has a fraction of an atom with six additional full atoms positioned at the center of each cube face.
4. calculate packing efficiency
a.Calculate the volume of the unit cell.
b.Count how many atoms there are per unit cell.
c.Calculate the volume of a single atom and multiply by the number of atoms in the unit cell.
d.Divide this result by the volume of the unit cell.