Types Of Voids And Radius Ratio 15

Question 1

Types of packing

Answer 1

1D
2D
3D

Question 2

1D ka CN

Answer 2

2

Question 3

In 2d how many types of packing present

Answer 3

1. Square packing [cn. 4]
   2.close packing [cn. 6]

Question 4

In 2D packing efficiency can be calculated by

Answer 4

Area of atom/area of

Question 5

Types of 3D packing

Answer 5

1. 2D ki square packing ko 3D me : [cn 6], 52% packed…similar to pcc
2. Agr 2D ki ek layer + 2D ki ek layer voids me + …….: give BCC [ 8 ]
3. 2D close pack + 2D close pack in voids of 1 layer +2D close pack in voids of 2nd layer +….ABABAB TYPE [ ]…. CCP 74%
4. SAME AS ABOVE ABCABCABC [ ]… FCC ,most closed packing 74%

Question 6

Each voids in 2D HCP packing surrounded by how many circles

Answer 6

3

Question 7

Types of voids

Answer 7

Trigonal planer
Tetrahedral
Octahedral
Cubic

Question 8

Cations occupy
Anions occy

Answer 8

1. Voids
2. Lattice points

Question 9

CN. Of trigonal planer voids

Answer 9

This void seen in 2D closed packing
[ 3]

Question 10

Cation ki size kaisi hoti hai trigonal planer voids me

Answer 10

Small size of cation can only occupy these voids
r+/r- = 0.155-0.225

Question 11

Tetragonal voids

Answer 11

ABAB layer of 3D form this
CN 4
Cations of larger size can fit in the voids
r+/r-= 0.225 -0.414

Question 12

Octahedral voids

Answer 12

CN . 6
0.414-0.732

Question 13

Simple cubic void

Answer 13

Formed when 3D= 2D square +2D square (not in voids )
r+/r-= 0.732-0.999
CN.8

Question 14

Agr hum cation ka size bada Kar DE anion ke size se to kya radius ration 1 se bada ho jayega

Answer 14

Nhi
It is not ,andaitary that r+ is always up r- can be up when it’s size is less

Question 15

Radii of Na+ is 116, And Cl- is 116
In which type of void actions present

Answer 15

Octahedral