What is the nature of octahedral holes (voids)?

  • A
    $A$ simple triangular void surrounded by four spheres
  • B
    $A$ bi-triangular void surrounded by four spheres
  • C
    $A$ bi-triangular void surrounded by six spheres
  • D
    $A$ bi-triangular void surrounded by eight spheres

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In a face-centered cubic lattice,a unit cell face is shared equally by how many unit cells?

$A$ compound is formed by elements $A$ and $B$. This crystallizes in a cubic structure where atoms $A$ are at the corners of the cube and atoms $B$ are at the body center. The simplest formula of the compound is:

$CsBr$ has a $bcc$ structure. If the edge length is $4.3 \ \overset{\circ}{A}$,what is the minimum distance between $Cs^+$ and $Br^-$ ions in $\overset{\circ}{A}$?

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