S/N

Properties (Unit Cell)

Ice

Structure I (sI)

Structure II (sII)

1

Water molecules number

4

46

136

2

Lattice parameters at 273 K, nm

a = 0.452, c = 0.736

1.20

1.73

3

Dielectric constant at 273 K

94

~58

58

4

Water diffusion correlation time (μsec)

220

240

25

5

Water diffusion activation energy (kJ/m)

58.1

50

50

6

Shear Velocity (Vs), m/s

1949

1963.6

2001.1

7

Compressional Velocity (Vp), m/s

3870.1

3778.0

3821.8

8

Refractive index, 638 nm, −3˚C

1.3082

1.3460

1.350

9

Density, kg/m3

916

912

940

10

Poisson’s Ratio

0.33

~0.33

~0.33

11

Bulk Modulus (272 K)

8.8

5.6

-

12

Shear Modulus (272 K)

3.9

2.4

-

13

Velocity Ratio (comp./shear)

1.99

1.92

1.91

14

Linear thermal expn., K1 (200 K)

56 × 10−6

77 × 106

52 × 10−6

15

Heat capacity, J/kg-K

3800

3300

3600

16

Thermal conductivity, W/m-K (263 K)

2.23

0.49 ± 0.02

0.51 ± 0.02