Packing in voids of ionic solids

A compound AB has rock salt type structure. The formula weight of AB is 6.023 Y amu, and the closest AB distance is $Y^{\frac{1}{3}}$ nm, where Y is an arbitrary number. The density of lattice is

In which of the following crystals, the alternate tetrahedral voids are occupied?

The edge length of ${\mathrm{M}}^{+}{\mathrm{X}}^{-}$ ($\mathrm{fcc}$ structure) is $7.2 \stackrel{\mathrm{o}}{\mathrm{A}}$. Assuming ${\mathrm{M}}^{+}-{\mathrm{X}}^{-}$ contact along the cell edge, calculate the radius of ${\mathrm{X}}^{-}$ ion $\left({\mathrm{r}}_{{\mathrm{M}}^{+}}=1.6 \stackrel{\mathrm{o}}{\mathrm{A}}\right)?$

An ionic crystal lattice has ${\mathrm{r}}^{+}/{\mathrm{r}}^{-}$ radius ratio of $0.524$. Its coordination number is

Explain how to deduce coordination number of cations.

Write note on radius ratio rule for ionic compounds.

${\mathrm{S}}_1\text{:}$ The distance between ${\mathrm{Na}}^{+}$ and ${\mathrm{Cl}}^{-}$ in $\mathrm{NaCl}$ crystal is more than half of edge length.

${\mathrm{S}}_2\text{:}$ The number of triangular voids in the given arrangement in the enclosed region is $3$.

${\mathrm{S}}_3\text{:}$ In $\mathrm{ZnS}$ structure, $2 {\mathrm{Zn}}^{2+}$ and $2 {\mathrm{S}}^{2-}$ ions are present in each unit cell.

In a solid, ${\mathrm{S}}^{2-}$ions are packed in $\mathrm{FCC}$ lattice. ${\mathrm{Zn}}^{2+}$ occupy half of the tetrahedral voids in an alternating arrangement. Now if a plane is cut (as shown) then the cross-section would be:

In the sphalerite $\left(\mathrm{ZnS}\right)$ structure, ${\mathrm{S}}^{2-}$ ions form a face-centred cubic lattice. Then ${\mathrm{Zn}}^{2+}$ ions are present on the body diagonals at a distance of __________ from the corner.

The range of radius ratio $\left({\mathrm{r}}^{+}/{\mathrm{r}}^{-}\right)$ for an octahedral arrangement of ions in an ionic solid is

$\mathrm{KCl}$ crystallises in the same type of lattice as does $\mathrm{NaCl}$. Given that, ${\mathrm{r}}_{{\mathrm{Na}}^{+}}/{\mathrm{r}}_{{\mathrm{Cl}}^{-}}=0.55$ and ${\mathrm{r}}_{{\mathrm{K}}^{+}}/{\mathrm{r}}_{{\mathrm{Cl}}^{-}}=0.74$.

Calculate the ratio of the side of the unit cell of $\mathrm{KCI}$ to that of $\mathrm{NaCl}$.

An ionic compound is expected to have a tetrahedral structure if ${\mathrm{r}}_{+}/{\mathrm{r}}_{-}$ lies in the range of

How many unit cells are present in a cube-shaped ideal crystal of $\mathrm{NaCl}$ of mass $1.00 \mathrm{g}$? (Atomic masses: $\mathrm{Na}=23, \mathrm{Cl}=35.5$)

A binary solid $\left({\mathrm{A}}^{+}{\mathrm{B}}^{-}\right)$ has a rock salt structure. If the edge length is $400 \mathrm{pm}$ and the radius of the cation is $75$ $\mathrm{pm},$ then, the radius of the anion is

In a sodium chloride structure, the percentage of the octahedral voids occupied by cations is

In the crystal lattice of diamond, carbon atoms adopt

In zinc blende structure, the coordination number of ${\mathrm{Zn}}^{2+}$ ion is

A solid $\mathrm{AB}$ has $\mathrm{NaCl}$ type of structure. If the radius of the cation $\mathrm{A}$ is $100$ $\mathrm{pm}$, then the radius of the anion $\mathrm{B}$ in $\mathrm{pm}$ using octahedral dimension will be

In sodium chloride, ${\mathrm{Cl}}^{-}$ ions form $\mathrm{CCP}$ arrangement. Which site will ${\mathrm{Na}}^{+}$ ions occupy in this structure?

Which one of the following statements is incorrect about rock salt type?