Distinguish between tetrahedral and octahedral voids?
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Tetrahedral void is a simple triangular void in a crystal and is surrounded by four spheres arranged tetrahedrally around it. On the other hand, an octahedral void is a double triangular void with one triangle vertex upwards and the other triangle vertex downwards and is surrounded by six spheres.
Difference are as follows:-
Crystal System
Tetrahedral Voids can be found in substances having a tetrahedral arrangement in their crystal system. Octahedral Voids can be found in substances having an octahedral arrangement in their crystal system.
Location in the Unit Cell
Tetrahedral Voids can be observed in edges of the unit cell.
Octahedral voids can be observed in the centre of the unit cell.
Coordination Number
The coordination number of the tetrahedral void is four.
The coordination number of the octahedral void is six.
Number of Voids in the Crystal Lattice
There are two tetrahedral voids per sphere in the crystal lattice.
There are one octahedral void per sphere in the crystal lattice.
Difference are as follows:-
Crystal System
Tetrahedral Voids can be found in substances having a tetrahedral arrangement in their crystal system. Octahedral Voids can be found in substances having an octahedral arrangement in their crystal system.
Location in the Unit Cell
Tetrahedral Voids can be observed in edges of the unit cell.
Octahedral voids can be observed in the centre of the unit cell.
Coordination Number
The coordination number of the tetrahedral void is four.
The coordination number of the octahedral void is six.
Number of Voids in the Crystal Lattice
There are two tetrahedral voids per sphere in the crystal lattice.
There are one octahedral void per sphere in the crystal lattice.
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