Bcc lattice a and b type of atom are present a atom are at the corrners while b type are at the body centre. If in each unit cell one of the a type atom missing from the corner what is the simplest of the formula
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No of A atoms at the corners = 7
Contribution of A atoms towards unit cell = 7 X1/8 = 7/8
No of B atoms at the body centre =1
Contribution of B atoms towards unit cell =1
Ratio of A:B = 7/8:1
= 7:8
Formula is A7B8
Contribution of A atoms towards unit cell = 7 X1/8 = 7/8
No of B atoms at the body centre =1
Contribution of B atoms towards unit cell =1
Ratio of A:B = 7/8:1
= 7:8
Formula is A7B8
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