Schottky defect in crystals is observed when
- an ion leaves its normal site and occupies an interstitial site
- unequal number of cations and anions are missing from the crystal lattice
- equal number of cations and anions are missing from the crystal lattice
- there is large difference in size of positive and negative ions.
The Correct Option is C
Solution and Explanation
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List-II
(A) Hexagonal (I) ∝ ≠ β ≠ γ ≠ 90° (B) Orthorhombic (II) ∝ = γ = 90°, β ≠ 90° (C) Triclinic (III) ∝ = β = 90°, γ = 120° (D) Monoclinic (IV) ∝ = β = γ = 90°
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Concepts Used:
Solid State
Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions.
Types of Solids:
Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;
- Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
- Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.
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