XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 1629
Figure 3. Energy levels at the semiconductor surface for various mineral sulphides, and energy levels of
oxidants in solution, based primarily on thermodynamic calculations
Figure 4. Absorption of different wavelengths of light by sphalerite result in colours ranging from (a) red/orange (cleiophane)
to (b) black (marmatite) as the concentration of iron in the sphalerite increases
Figure 3. Energy levels at the semiconductor surface for various mineral sulphides, and energy levels of
oxidants in solution, based primarily on thermodynamic calculations
Figure 4. Absorption of different wavelengths of light by sphalerite result in colours ranging from (a) red/orange (cleiophane)
to (b) black (marmatite) as the concentration of iron in the sphalerite increases