Cubic crystal system

  • a rock containing three crystals of pyrite (fes2). the crystal structure of pyrite is primitive cubic, and this is reflected in the cubic symmetry of its natural crystal facets.
    a network model of a primitive cubic system
    the primitive and cubic close-packed (also known as face-centered cubic) unit cells

    in crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. this is one of the most common and simplest shapes found in crystals and minerals.

    there are three main varieties of these crystals:

    • primitive cubic (abbreviated cp and alternatively called simple cubic)
    • body-centered cubic (abbreviated ci or bcc)
    • face-centered cubic (abbreviated cf or fcc, and alternatively called cubic close-packed or ccp)

    each is subdivided into other variants listed below. note that although the unit cell in these crystals is conventionally taken to be a cube, the primitive unit cell often is not.

  • bravais lattices
  • crystal classes
  • voids in the unit cell
  • multi-element compounds
  • weaire–phelan structure
  • see also
  • references
  • further reading
  • external links

A rock containing three crystals of pyrite (FeS2). The crystal structure of pyrite is primitive cubic, and this is reflected in the cubic symmetry of its natural crystal facets.
A network model of a primitive cubic system
The primitive and cubic close-packed (also known as face-centered cubic) unit cells

In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.

There are three main varieties of these crystals:

  • Primitive cubic (abbreviated cP and alternatively called simple cubic)
  • Body-centered cubic (abbreviated cI or bcc)
  • Face-centered cubic (abbreviated cF or fcc, and alternatively called cubic close-packed or ccp)

Each is subdivided into other variants listed below. Note that although the unit cell in these crystals is conventionally taken to be a cube, the primitive unit cell often is not.