The unit cell of and oxide crystal with a cubic lattice parameter of 0.4 nm contains the following atoms with their positioning: B at (0,0,0) A at ( ½ , ½ , ½ ) O at ( ½ , 0,0) O at ( 0, ½ ,0) O at (0, 0, ½ ) i) Sketch the unit cell, including all atoms. ii) What is the chemical formula of the compound. iii) Specify the lattice and basis of this crystal. iv) What are the coordination numbers of A and B.
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