The influence of silicate species on the morphology of goethite (α-FeOOH) grown from ferrihydrite (5Fe2O3·9H2O)
Abstract
In the presence of 9.6 mol% silicate species, goethite (α-FeOOH) grows from ferrihydrite (5Fe2O3·9H2O) at pH 12.5 as a mixture of pseudohexagonal plates and bipyramids, whereas in the absence of silicate species, acicular crystals of goethite are formed.