what type of crystalline solid is alcl3
The smallest repeating pattern of crystalline solids is known as the unit cell, and unit cells are like bricks in a wallâthey are all identical and repeating. The other main type of solids are called the amorphous solids.Amorphous solids do not have much order in their structures.Though their molecules are close together and have little freedom to move, they are not arranged in a regular order as are those in crystalline solids.here are two main categories of solidsâcrystalline solids and amorphous solids. Crystalline solids are those in which the atoms, ions, or molecules that make up the solid exist in a regular, well-defined arrangement.