A hypothetical AX type of ceramic material is known to have a density of 3.15 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.41 nm. The atomic weights of the A and X elements are 90.5 and 37.3 g/mol, respectively. On the basis of this information, which one of the following crystal structures is possible for this material? a. Sodium chloride
b. Cesium chloride
c. Zinc blende

b.

Explanation:

From the given information:

where;

a = 0.41 nm =

M = 90.5 + 37.3 = 127.8 g/mol

p = 3.15 g/cm³

∴

Z = 1

Thus, the ceramic material has a simple cubic crystal system and the crystal structure is possible to be Cesium chloride.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.