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en.wikipedia.org/wiki/Coordination_number

In chemistry, crystallography, and materials science, the coordination number, also called ligancy, of a central atom in a molecule or crystal is the number of atoms, molecules or ions bonded to it. The ion/molecule/atom surrounding the central ion/molecule/atom is called a ligand.This number is determined somewhat differently for molecules than for crystals.

www.reference.com/.../coordination-number-fcc-20b4099847fc881e

The coordination number of a face-centered cubic, or FCC, is 12. This represents the number of other atoms that an atom touches within the crystal lattice structure.

www.answers.com/Q/What_is_the_coordination_number_FCC

Introduction to Coordination Numbers . Your question, if I understand it correctly, asks to explain the reasoning behind the coordination number, or number of adjacent atoms, of an atom in a ...

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May i know how to count the coordination number of fcc? i know coordination number is count by the number in contact. i can understand the coordination number of bcc which is 8 , becoz that is 8 number in contact . but why fcc is 12 , not 13? i counted it as 13 if we take one face atom as 'reference ...

www.quora.com/How-can-we-say-that-the-coordination-number...

In FCC structure, the atoms are present at each corner as well as each face centre. So we r calculating co ornination number by two ways. If you consider the corner atom of a cube in fcc structure the the face centered atoms are the nearest atoms so one corner atom is sorrounded by 4 faces in x plane,4 faces y plane and 4 faces in z plane .so total numberof 4*3=12 face centered atoms .so co ...

en.wikipedia.org/wiki/Cubic_crystal_system

Each sphere in a cF lattice has coordination number 12. Coordination number is the number of nearest neighbours of a central atom in the structure. The face-centered cubic system is closely related to the hexagonal close packed (hcp) system, where two systems differ only in the relative placements of their hexagonal layers. The plane of a face ...

www.quora.com/What-is-coordination-number

The coordination number of an atom in a molecule or poly-atomic ion is found by counting the number of atoms bound to it, not the chemical bonds, it is found by counting the number of neighboring atom. Coordination number looks at an atom in the interior of a lattice.

chem.libretexts.org/Bookshelves/Physical_and_Theoretical...

All crystal lattices are built of repeating unit cells. In a unit cell, an atom's coordination number is the number of atoms it is touching. The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell.

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www.youtube.com/watch?v=3d_rlA-pfeI

How to work out the coordination number of an atom in a covalently bonded molecule or polyatomic ion, a transition metal complex, a metallic solid or an ionic compound.