Question:

In zinc blende structure,

Updated On: Jul 6, 2022
  • zinc ions occupy half of the tetrahedral sites
  • each $Zn^{2+}$ ion is surrounded by six sulphide ions
  • each $S^{2-}$ ion is surrounded by six $Zn^{2+}$ ions
  • it has fee structure
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The Correct Option is A

Solution and Explanation

$ZnS$ has a $ccp$ structure. $S^{2-}$ ions are present at the corners of the cube and centre of each face. $Zn^{2+}$ ions occupy half of the tetrahedral sites. Each $Zn^{2+}$ ion is surrounded by four $S^{2-}$ ions and each $S^{2-}$ ion is surrounded by four $Zn^{2+}$ ions.
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Notes on The solid state

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. 

Solid State

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.