Octahedral Void Or Tetrahedral Void

Question 1

FCC KE UNAR KITNE NO. OF VOIDs PRESENT HAI

Answer 1

8 tetrahedral void

Question 2

Can u explain how 8 tetrahedral voids present

Answer 2

If one fcc cube is cut in to 8 cubes then each centre of cube has 1 tetrahedral void

Question 3

How many octahedral voids present in a unit cell

Answer 3

1 octahedral voids at body centa
12 at edge centre [ ye Jo edge pr laga hoga void wo share ho rha hoga 4 unit cell se to 1 unit cell me Iskandar contribution 1/ 4th hee hoga to total no. Of octahedral void has one unit cell is 3
Means 4 octahedral voids
Body centre
1x1=1
Edge centre
12x1/4=3
4Oĥ

Question 4

In fcc
Atoms
Td
Oh

Answer 4

4 Atoms
8 T voids
4 OH voids

Question 5

In BCC
Atoms
Td voids
Oh voids

Answer 5

2
4td
2Oh

Question 6

In SCC
Atoma
Td voids
Oh voids

Answer 6

1
2Td
1Oh

Question 7

NaCl is type of unit cell
Na+ occupy
Cl- occupy
CN

Answer 7

FCc unit cell
Od voids na+=4
Cl- lattice points =4
So formula Na4Cl4=NaCl
Ionic distance = a/2
CN. 6
AB type

Question 8

ZnS ( zinc blende)
Unitcell
Zn+2
S2-
CN
Type

Answer 8

FCC
4 td voids
4
4
AB
a x root 3/4

Question 9

CsCl
Unit cell
Cs+
Cl-
CN
Type
Internuclear distance

Answer 9

SCC
Cs+ =1 cubic void
Cl- = 1
CN = 8
AB
ax root 3/2

Question 10

Na cl
ZnS
CsCl

Answer 10

6
4
8