Property

Nitrogen gas A

Nitrogen gas B

Argon gas

D₁₀ (μm)

11.8

10.1

10.8

D₅₀ (μm)

23.4

21.3

19.5

D₉₀ (μm)

38.0

32.1

31.9

Convexity at D₅₀

0.992

0.992

0.993

Aspect ratio at D₅₀

0.978

0.978

0.983

Circularity at D₅₀

0.911

0.914

0.940

Mean ρ_app (g/cm³)

4.38

4.35

4.53

Mean ρ_tap (g/cm³)

5.00

5.07

5.19

Mean Hausner Ratio

1.14

1.16

1.15

Mean Hall flow rate (s/50g)

13.3

14.3

13.1

Mean angle of repose (˚)

31.6

32.6

30.9

Mean avalanche angle (˚)

40.9

41.0

36.7

Mean specific energy (mJ/g)

2.82

2.97

3.00

Mean volume porosity (%)

4.8

3.0

5.4

Permeability, at applied normal stress = 8 kPa (10⁹ cm²)

9.0

6.5

5.8