Experience in data evaluation has shown that experimentalists sometime miss the symmetry for centered Bravais lattices. In such cases, the compound is often reported in a crystal system of too low symmetry.
In this highly unusual singularity, all four lattices are different Bravais lattices, each of which is characterized by a different reduced form.
Determination of the Bravais Lattice and Conventional Cell
Table 4 shows that most organic compounds crystallize in a triclinic, monoclinic, or orthorhombic Bravais lattice with the primitive lattice (87.1 %) by far the most common.
But as Table 9 illustrates, for the cubic F original cell, six of the sublattices (\X\ = 1/2) have identical reduced forms (i.e., reduced form 23 = C-centered Bravais Lattice).