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In a face-centred cubic arrangement of a and b atoms, where a atoms are at the corners \r\nof the unit cell and b atoms at the face-centres, one of the a atoms is
In a face-centred cubic arrangement of A and B atoms, where A atoms are at the corners \r\nof the unit cell and B atoms at the face-centres, one of the A atoms is missing from one \r\ncorner in each unit cell. What is the simplest formula of the compound?
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Suman Kumar
Number of atoms A from the corners of unit cell = 7/8 Number of atoms B from the faces of unit cell = 3 Thus, A : B : : 7 8 : 3 , so that we can write the formula as A7/8B3. Hence, the simplest formula is A7B24.