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Explain face centered tetragonal unit cell.

Dear Student,

Face centred tetragonal lattice is equivalent to a small body centred tetragonal lattice. 


The tetragonal system has two equal sides (a=b≠c) and all three angles at 90º. In the face centred lattice, atoms are arranged at the corners of the cell as well as on each face. 

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Please explain it with a diagram.
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In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a square base (a by a) and height (c, which is different from a).
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Ajeet I don't understand it.
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Ohh ok you are talking about crystal system. But I need the value of Z and its diagram too. But I know you can't post diagram but can you explain no. of particles in it.
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Consider a cube each with an atom stuck up on the centre of its face . Now the atoms inside the cube are forming tetragonal shape which needs 6 atoms . 
 
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Tetragonal shape can be determined by this 

a is equal to b but b is not equal to c 

angle at the joining of a and b and c is 90 degrees

It can be imagined as a matchbox with equal length and breadth but different height
 

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Thank you Aryaman
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Read the textbook and note the keywords of it and answer or ask Questions. 
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Kya tum paagal ho naveen
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Do you understood face centred tetragonal
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