Understanding Perovskite Structure Compounds
The perovskite structure refers to a specific crystal structure type with the general chemical formula $ABX_3$. Compounds exhibiting this structure are crucial in various fields, including materials science and chemistry.
Analyzing Potential Perovskite Compounds
We need to identify which of the given compounds fit the $ABX_3$ general formula and are known to possess the perovskite structure in the solid state.
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Option 1: $CaTiO_3$ (Calcium Titanate)
This compound has the formula $ABX_3$, where A = Ca, B = Ti, and X = O. Calcium titanate is a well-known example exhibiting the perovskite crystal structure.
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Option 2: $NiFe_2O_4$ (Nickel Ferrite)
This compound follows the $AB_2O_4$ formula, characteristic of the spinel structure, not the perovskite structure.
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Option 3: $Fe_3O_4$ (Magnetite)
Magnetite can be represented as $Fe^{2+}Fe_2^{3+}O_4$, which also fits the $AB_2O_4$ spinel structure, not the perovskite ($ABX_3$) structure.
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Option 4: $CsPbI_3$ (Cesium Lead Iodide)
This compound fits the $ABX_3$ formula, where A = Cs, B = Pb, and X = I. Halide compounds like $CsPbI_3$ are known to adopt the perovskite structure.
Identifying Correct Perovskite Structures
Based on the analysis, compounds fitting the $ABX_3$ formula and known to possess the perovskite structure are:
- $CaTiO_3$
- $CsPbI_3$
Therefore, the compounds exhibiting the perovskite structure are $CaTiO_3$ and $CsPbI_3$.
Important Questions from Solid State
- The correct statement(s) about the structure of metal oxides is(are)
- The Miller indices of the crystal plane which cut through the crystal axes at (2a, -3b, -3c) is :
- For an inverse spinel, $AB_2O_4$, the A and B, respectively, can be
- When crystals of sodium chloride are heated in the presence of sodium vapor, they turn yellow. This is due to the formation of
The band structure given below represents a
