Close Packed Structures and Packing Efficiency

$\mathrm{CsBr}$ has bcc structure with edge length $4.3 \mathrm{\AA }$ . The shortest inter ionic distance in between ${\mathrm{Cs}}^{+}$ and ${\mathrm{Br}}^{-}$ is:

The distance between an octahedral and a tetrahedral void in $\mathrm{pm}$ in FCC lattice would be: 

(Consider edge length is $7 \mathrm{pm}$)

What is the radius of sodium atom if it crystallizes in $\mathrm{bcc}$ structure with the cell edge of $400 \mathrm{pm}$ ?

The relationship between edge length and the radius of the simple cubic unit cell is _____.

What is coordination number? Give the coordination number of the simple cubic lattice.

The coordination number for molybdenum in hexagonal closed packing is 

The coordination number in one-dimension close packing is 

The coordination number is equal to _____ in one-dimensional close packing in crystalline solid.

Describe close packing in one dimension in crystalline solids.

The lattice generated in three-dimensional closed packing from two-dimensional square close-packed layers is

Define three-dimensional close packing from two-dimensional square close-packed layers.

Two dimensions coordination number of a molecule in square close-packed layers is

Discuss the alignment of spheres in the square closed packing in two dimensions.

Octahedral voids are formed when the triangular voids in second layer exactly overlap with similar voids in the first layer.

The coordination number of an atom in a body-centered cubic structure is______

[Assume that the lattice is made up of atoms.]

A unit cell of ${\mathrm{B}\mathrm{a}\mathrm{C}\mathrm{l}}_2$ (fluorite structure) is made up of eight ${\mathrm{B}\mathrm{a}}^{2+}$ ions and four ${\mathrm{C}\mathrm{l}}^{-}$ ions.