Table 6 Standardized data statistics.

From: Micro-structure and morphology of tailings sand under different oxidation and acidification degree

Oxidation and acidification degree

0%

25%

50%

75%

100%

F2

0.000

0.351

0.667

0.931

1.000

F3

0.000

0.360

0.683

0.846

1.000

  1. F2 refers to 2D fractal dimension of crystal contour; F3 refers to 3D fractal dimension of gray surface.