Abstract:

In this paper, the relation between lattice constant of orthorhombic perovskites solids and atomic radii is examined and new empirical equations for the relationship are proposed. These enable us to achieve improved prediction performance of the lattice constant of structurally known perovskites. The average absolute relative error in the predicted ‘a’ lattice constant so derived is expected to be about 3.40%. We have applied the proposed relation to ABX₃ (A: large cation, B: transition metal, X: anion) and found a better agreement with the experimental data as compared to the value evaluated by earlier researchers.

Keywords:lattice constant, perovskites solids, ABX₃.

D. Sharma, A.D. Awasthi & Raj Kumar

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