If the radius ratio is in the range of $0.414 - 0.732,$ then the coordination number will be

For an ionic crystal with the general formula $AX$,the coordination number is $6$. What is the radius ratio range?

$A$ 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:

In a face-centred cubic $(FCC)$ lattice,atoms of $A$ form the corner points and atoms of $B$ form the face-centred points. If two atoms of $A$ are missing from the corner points,the formula of the ionic compound is

What is the coordination number of a particle in $hcp$ structure?

In a compound $AB$,$A$ atoms occupy the corners of the cube and the $B$ atoms occupy the body centre of the cube. If the $A$ atoms possess magnetic moment due to up-spin and $B$ atoms possess magnetic moment due to down-spin,the magnetic nature of the compound $AB$ in an isolated unit cell is