Stoichiometric amounts of the metal nitrates, La(NO3)36H2O, Sr(NO3)2 and Fe(NO3)39H2O, citric acid and ammonium nitrate were dissolved in de-ionized water separately and stirred for 30 min to get clear solutions.
Stoichiometric amounts of the metal nitrates, La(NO3)36H2O,Sr(NO3)2 and Fe(NO3)39H2O, citric acid and ammonium nitratewere dissolved in de-ionized water separately and stirred for30 min to get clear solutions.