question about unit cells?

Question

The atoms shown as part of unit cell diagrams ( such as cubic) -with lines linking them together - often shown in mineral text books, are they centers of atoms and if so does it mean the nucleoli? In other words the distances between atoms in unit cells diagrams, are we talking between the centers and does the centers mean between the nucleoli? Is the atom centers always the nucleolus?

Answer 1

When you are talking about atoms, the differences in distance from edge to edge or nucleus to nucleus are fairly negligible in the case of unit cells.

Answer 2

The center of a cell is the nucleolus if the cell is a eukaryote.