S/N

Properties of the Cages

Structure I

Structure II

Structure H

1

Cavity

Small

Large

Small

Large

Small

Medium

Large

2

Description

5¹²

5¹²6²

5¹²

5¹²6⁴

5¹²6⁴

4³5⁶6³

5¹²6⁸

3

Cavities/unit Cell

2

6

16

8

3

2

1

4

Density, kg/m³

912

940

1952

5

Unit cell parameters, nm

a = 1.2

a = 1.7

a = 1.21, c = 1.01

6

Average Cavity Radius, Å

3.95

4.33

3.91

4.73

3.91

4.06

5.71

7

Variation in radius, %

3.4

14.4

5.5

1.73

-

-

-

8

Lattice type

cubic

Face-centered cubic

Hexagonal

9

Coordination number,

20

24

20

28

20

20

36

10

Water molecules/unit Cell

46

-

136

-

34

-

-