Investigation of the structural state of potassium polytitanate replaced by iron

Investigations were carried out for iron ion-substituted potassium polytitanates (PPTs). The mechanism of iron incorporation into the interlayer space of the PPTs, the chemical purity of the polytitanate powders, and the particle morphology were studied. The replacement of potassium ions in the polytitanate structure was experimentally observed and the degree of this substitution was numerically evaluated at different stages of preparation. It was shown that the iron incorporation into the interlayer space of polytitanate was accompanied by the formation of lepidocrocite, which follows from data of Moessbauer spectroscopy. It was found that in the iron ions incorporation process used in the experiment polytitanate particles agglomerate, which may be associated with the formation of lepidocrocite.