The page has JSmol structures for unic cells including cubic, body centered cubic, and face centered cubic unit cells as well as for CsCl, Ni3Al, Cu2O, NaCl, CaF2, ZnS, diamond, Li3Bi, NaTl, NiAl and ReO3. The advanced page also has triclinic, monoclinic, hexagonal, orthorhombic, and tetragonal cells with all possible centering.
The purpose of this site is to help students visualize how much of an atom is in the unit cell so that compound stoichiometry can be determined.
Students can determine the empirical formula from an extended solid state structure.
Students will be able to understand that a unit cell represents the contents of an extended solid.
We have used a physical model kit to build solid state structures in class for many years. After building a few structures, students often want to try some more structures. These online models were created to allow continued study and practice out of class.
Cubic unit cells are appropriate for an introductory course. The advanced unit cells include all crystal systems and centering options.
The display options "faces" and "perspective" are recommended for counting atoms within the cell.