Fig. 1
From: Effect of Ni2+, Zn2+, and Co2+ on green rust transformation to magnetite
Green rust transformation to magnetite. A TEM image of GR hexagonal platelets before transformation; B TEM image cubic magnetite crystals after transformation; C X-ray diffractograms of GR samples heated at 85° C under anoxic conditions; D Reference X-ray diffractograms of magnetite and green rust sulfate