Crystal Lattice Structures: Reference Date:   1 Jan 1998
Last Modified: 21 Oct 2004

Index by Pearson Symbol

The Pearson symbol indicates the crystal symmetry and the number of atoms in the unit cell. For example, NaCl has a face-centered (F) cubic (c) structure with 8 atoms in the cube, so it is designated cF8. Cinnabar has 6 atoms in a hexagonal (h) primitive (P) cell, so it is designated hP6. Note that the Pearson symbol does not necessarily specify a unique structure (e.g., cF8).

You will notice a striking similarity between the Pearson symbol categories and the space group categories.

Pearson Symbol Categories:

Cf icon
a (asymmetric) type
Te icon
m (monoclinic) type
CuTe icon
o (orthorhombic) type
L1_0 icon
t (tetragonal) type
hcp icon
h (hexagonal and rhombohedral) type
fcc icon
c (cubic) type

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Structures indexed by: This is a mirror of an old page created at the
Naval Research Laboratory
Center for Computational Materials Science

The maintained successor is hosted at
and published as
M. Mehl et al., Comput. Mater. Sci. 136 (Supp.), S1-S828 (2017).