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Q. What does this two statemet mean?
1) There are two tetrahedral site for each sphere.
2) There is one octahedral site for each sphere.
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Answer :
1) There are two tetrahedral site for each sphere.
Meaning :- If the number of octahedral sites are half as there are two tetrahedral sites. These tetrahedral site is formed by four lattice atoms which means arrangement of atoms into a crystal structure.
2) There is one octahedral site for each sphere.
Meaning :- We know that we know that there is one octahedral site for each sphere as the number of octahedral sites are half as there are two tetrahedral sites.
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Here is your answer
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1) There are two tetrahedral site for each sphere.
These tetrahedral sites is formed by four lattice atoms which means arrangement of atoms into a crystal structure.
Tetrahedral Voids:
You will notice that a triangle-shaped void is seen in this type of alignment. The sphere which is in the depression will leave a void between itself and the sphere in the layer above. This void is the Tetrahedral Void.
The void is much smaller than the sphere, i.e. it has a smaller volume. And the coordination number of a tetrahedral void is four because of the void forms at the center of four spheres.
2) There is one octahedral site for each sphere.
There is one octahedral site for each sphere as the no. of octahedral sites are half as there are two tetrahedral sites.
Octahedral Voids:
If you observe a three-dimensional structure of a crystal lattice you will observe the gaps in between the spheres. These are the voids. As you see that tetrahedral voids are triangular in shape. When two such voids combine, from two different layers they form an octahedral void.
So when the tetrahedral void of the first layer and the tetrahedral void of the second layer align together, they form an octahedral void. Here the void forms at the center of six spheres. So we say the coordination number of an octahedral void is six.
_______________________
Thanks!! ✌
Here is your answer
_______________________
1) There are two tetrahedral site for each sphere.
These tetrahedral sites is formed by four lattice atoms which means arrangement of atoms into a crystal structure.
Tetrahedral Voids:
You will notice that a triangle-shaped void is seen in this type of alignment. The sphere which is in the depression will leave a void between itself and the sphere in the layer above. This void is the Tetrahedral Void.
The void is much smaller than the sphere, i.e. it has a smaller volume. And the coordination number of a tetrahedral void is four because of the void forms at the center of four spheres.
2) There is one octahedral site for each sphere.
There is one octahedral site for each sphere as the no. of octahedral sites are half as there are two tetrahedral sites.
Octahedral Voids:
If you observe a three-dimensional structure of a crystal lattice you will observe the gaps in between the spheres. These are the voids. As you see that tetrahedral voids are triangular in shape. When two such voids combine, from two different layers they form an octahedral void.
So when the tetrahedral void of the first layer and the tetrahedral void of the second layer align together, they form an octahedral void. Here the void forms at the center of six spheres. So we say the coordination number of an octahedral void is six.
_______________________
Thanks!! ✌
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