Calculations involving Unit Cell Dimensions

The coordination number of a metal crystallizing in a hexagonal close-packed structure is:

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

If the length of the body diagonal of a $\mathrm{FCC}$ unit cell is $\mathrm{x}Å$, the distance between two octahedral voids in the cell in $Å$ is

The number of nearest neighbours in a $\mathrm{BCC}$ unit cell is

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

In a simple cubic lattice, the co-ordination number 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:

An ionic crystal lattice has $\frac{{\mathrm{r}}^{+}}{{\mathrm{r}}^{-}}$ radius ratio of $0.320$, its coordination number is:

The closest distance between the two atoms in a $\mathrm{FCC}$ lattice, in terms of edge length $\text{'}a\text{'}$ is

A metal crystallizes in BCC lattice. The $\%$ fraction of edge length not covered by atom is

An element has a body centered cubic (bcc) structure with a cell edge of $288\mathrm{pm}$. The atomic radius is

In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion $\left({\mathrm{Ca}}^{2+}\right)$ and fluoride ion $\left({\mathrm{F}}^{-}\right)$ are

The radius of metal atom can be expressed in terms of the length of a unit cell is:

Niobium is found to crystallise with bcc structure and found to have density of $8.55 \mathrm{g} {\mathrm{cm}}^{-3}$.  Determine the atomic radius of niobium if its atomic mass is $93$ $(14.29 \mathrm{nm})$.

The co-ordination number of eight for cation is found in : 

In which of the following structures, the anion has maximum coordination number: 

Explain:

Coordination number

The radius of the largest sphere which fits properly at the centre of the edge of a body-centred cubic unit cell is: (Edge length is represented by $\text{'}\mathrm{a}\text{'}$)

Sodium metal crystallizes in a body-centred cubic lattice with a unit cell edge of $4.29 \stackrel{\circ }{\mathrm{A}}.$ The radius of the sodium atom is approximate