Noun
unit cell (plural unit cells)
(crystallography) The smallest repeating structure (parallelepiped) of atoms within a crystal, from which the structure of the complete crystal can be inferred.
A crystal structure (an arrangement of atoms in a crystal) is characterized by its unit cell, a small imaginary box containing one or more atoms in a specific spatial arrangement. Source: Internet
By contrast, macromolecular crystallography often involves tens of thousands of atoms in the unit cell. Source: Internet
Greenwood, p. 1275 Chemical compounds Here a, b and c are lattice constants in picometers, No is space group number and Z is the number of formula units per unit cell ; fcc stands for the face-centered cubic symmetry. Source: Internet
Haüy's study led to the correct idea that crystals are a regular three-dimensional array (a Bravais lattice ) of atoms and molecules ; a single unit cell is repeated indefinitely along three principal directions that are not necessarily perpendicular. Source: Internet
Its Curie temperature is convert, meaning that bulk nickel is non-magnetic above this temperature. citation The unit cell of nickel is a face-centered cube with the lattice parameter of 0.352 nm, giving an atomic radius of 0.124 nm. Source: Internet
Limitations seeAlso As the crystal's repeating unit, its unit cell, becomes larger and more complex, the atomic-level picture provided by X-ray crystallography becomes less well-resolved (more "fuzzy") for a given number of observed reflections. Source: Internet