Crystal Structure
The ordered, periodic three-dimensional arrangement of atoms, ions, or molecules in a crystalline solid.
Governing formula
Crystal Structure = Lattice + Basis
SI unit
Å or nm (Lattice Parameters a, b, c)
In depth
A crystal structure is constructed by repeating a fundamental group of atoms (the basis) at every point of a periodic spatial lattice (Bravais lattice). Solids can crystallize into 14 distinct 3D Bravais lattices grouped into 7 crystal systems.
Examples in the real world
Face-Centered Cubic (FCC) copper, Body-Centered Cubic (BCC) iron, and Diamond Cubic silicon.