Explain the concepts of motif and space lattice.

(N/A) $1$. When tiles are laid on a floor,a repeated pattern is formed. If we mark a specific point on each tile (e.g.,the center) and ignore the tiles themselves,we obtain a set of points. This set of points acts as a scaffolding upon which the pattern is built. This scaffolding is known as a $Space \ Lattice$.
$2$. The structural unit (in this case,the tile) placed on each point of the lattice to develop the pattern is called the $Motif$ or $Basis$.
$3$. $A$ crystal structure is generated when these motifs are placed on the points of a space lattice. The lattice represents the pattern of points indicating the positions of these motifs.
$4$. $A$ $Space \ Lattice$ is a hypothetical framework for a crystal structure. When motifs are placed identically on each point of the space lattice,the actual crystal structure is obtained.
$5$. In summary,the combination of a $Motif$ and a $Space \ Lattice$ results in a crystal structure.