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:

How can three dimensional close packing from two dimensional square close-packing be formed.
 

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.

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.

If the packing fraction for spheres occupying a body-centred cubic structure is X, Report your answer by multiplying X with 100

Calculate the percentage of vacant space in a $\mathrm{Si}$ unit cubic cell. The unit-cell content for $\mathrm{Si}$ is $8$ and $\mathrm{r}=\frac{\sqrt{3}\mathrm{a}}{8}$.

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

The packing fraction of the element that crystallizes in simple cubic arrangement is -

Sodium metal crystallizes in a body centred cubic lattice with the cell edge $\mathrm{a}=4.29 \mathrm{Å}$. The radius of sodium atom is:

In reference to crystal structure, explain the meaning of the coordination number.

The space occupied by $\mathrm{BCC}$ arrangement is approximately

The number of hexagonal faces that are present in a truncated octahedron is

In one dimensional close packed arrangement, the coordination number is _____ .

In one dimensional close packed arrangement, the coordination number is $2$.