In an $A_{x} B_{y}$ crystal structure,$A$ atoms occupy all octahedral as well as all tetrahedral voids,and $B$ atoms are at the $FCC$ lattice points. What is the formula of the compound $A_{x} B_{y}$?

  • A
    $AB_3$
  • B
    $A_{10} B_{3}$
  • C
    $A_{15} B_{36}$
  • D
    $A_3 B$

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