The spinels have a general formula AIIB2IIIO4.  The oxide an…

The spinels have a general formula AIIB2IIIO4.  The oxide anions form a ccp (fcc) lattice and the cations occupy the tetrahedral or octahedral holes.  For NiFe2O4, please answer to the following questions (Please write your answer on a paper and upload the image file in the Assignments) : (a) Determine the CFSEs of Ni2+ occupying the tetraheral and octahedral holes in terms of Δo.  You must draw the electron configurations in the energy level diagrams (Note: The oxides are weak-field (high-spin) ligands and Δt ~ (1/2) Δo).      (b) Determine the CFSEs of Fe3+ occupying the tetraheral and octahedral holes in terms of Δo.  You must draw the electron configurations in the energy level diagrams (Note: The oxides are weak-field (high-spin) ligands and Δt ~ (1/2) Δo).      (c) Which cation (Ni2+, Fe3+) prefers the octahedral holes more strongly?  Briefly explain your answer. (d) Would you expect NiFe2O4 to form a normal or inverse spinel?  Briefly explain your answer.