Dear Ramesh Malladi thank you for your interesting technical question. For more detailed information about the preparation of zinc-doped nickel ferrite materials please have a look at the following potentially useful links:
1. Hydrothermal Synthesis of Zinc Doped Nickel Ferrites: Evaluation of Structural, Magnetic and Dielectric Properties
Article Hydrothermal Synthesis of Zinc Doped Nickel Ferrites: Evalua...
2. Microwave synthesis and characterization of Zn-doped nickel ferrite nanoparticles
Article Microwave synthesis and characterization of Zn-doped nickel ...
3. Influence of Zn+2 Doping on Ni-Based Nanoferrites;
(Ni1x ZnxFe2O4)
(see attached pdf file)
P.S. Please note that the compound "Fe2Cl3" does not exist.