Class 12 Chemistry The Solid State Formula of a Compound and Number of Voids Filled

Formula of a Compound and Number of Voids Filled

 

  • The number of octahedral voids present in a lattice = The number of close packed particles.
  • The number of tetrahedral voids produced is twice this number.
  • In ionic solids, the bigger ions i.e. anions forms close packed structure and the smaller ions i.e. cations occupy the voids.
  • If the latter ion is small then tetrahedral voids are occupied, if bigger, then octahedral voids are occupied.
  • In a compound, the fraction of octahedral or tetrahedral voids that are occupied depends upon the chemical formula of the compound.
  • Close packed structures have both tetrahedral and octahedral voids.

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