Rubidium chloride has two structures at different pressures. The ratio of the density of these two forms needs to be determined. Concept Introduction : In packing of atoms or molecules of a solid, the atoms/molecules are imagined as spheres. The two major types of close packing of the spheres in the crystal are hexagonal close packing and cubic close packing. Cubic close packing structure has face-centered cubic (FCC) unit cell. FCC unit has 4 units of atoms/molecules per unit cell.

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Chapter 16, Problem 120AE

Interpretation Introduction

Interpretation:

Rubidium chloride has two structures at different pressures. The ratio of the density of these two forms needs to be determined.

Concept Introduction :

In packing of atoms or molecules of a solid, the atoms/molecules are imagined as spheres. The two major types of close packing of the spheres in the crystal are hexagonal close packing and cubic close packing. Cubic close packing structure has face-centered cubic (FCC) unit cell. FCC unit has 4 units of atoms/molecules per unit cell.

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