A uni-univalent ionic crystal AX is composed of the following radii (arbitrary units) : `{:(A^+,A^-),(1.0,2.0):}` Assuming that ions are hard spheres , predict giving reasons whether the crystal will have sodium chloride cesium chloride structure. Calculate the volume of the unit cell.

A uni-univalent ionic crystal AX is composed of the following radii (a

1.	A uni-univalent ionic crystal AX is composed of the following radii (arbitrary units) : `{:(A^+,A^-),(1.0,2.0):}` Assuming that ions are hard spheres , predict giving reasons whether the crystal will have sodium chloride cesium chloride structure. Calculate the volume of the unit cell.
Answer» Correct Answer - NaCl, `216 (au)^3` `r_(+)//r_(-)`=2/1=0.5 which lies in the range 0.414-0.732 , Hence , it has sodium chloride structure. Edge=2 `(r_+ + r_-)` =6 au . Volume =`(6 au)^3=216(au)^3`

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A uni-univalent ionic crystal AX is composed of the following radii (arbitrary units) : `{:(A^+,A^-),(1.0,2.0):}` Assuming that ions are hard spheres , predict giving reasons whether the crystal will have sodium chloride cesium chloride structure. Calculate the volume of the unit cell.

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