nacl is fcc. refer optandon

In NaCl , each Na⁺ ion is surrounded by 6 Cl^- ions situated at the 6 corners of a regular octahedron.Similarly each Cl^- is surrounded by 6 Na⁺ ions.The co-ordination number of Na⁺ or Cl^- is 6.So NaCl is considered as FCC.The picture is the crystal structure of  NaCl

http://en.wikipedia.org/wiki/Sodium_chloride#Crystal_structure







 

http://departments.kings.edu/chemlab/animation/nacl.html

You can even refer these links

rate me if useful

NACL IS FCC    in nacl allthe cl- ions  occupy the fcc lattice nd the na+ ion  occupies the tetrahedral holes

the coordination of   NACL is  6:6

nd also NACL hasa rock salt structure.

hi

In the natrium chloride (NaCl) structure, the space lattice is face centered cubic (FCC). There are two such FCC

lattices which are separated by one half of the body diagonal of the unit cube. One lattice is occupied by Na atoms,

the other by Cl atoms. Each atom has 6 nearest neighbors of the opposite kind and is bound to these 6 atoms

which are arranged at the corners of the surrounding octahedron. The bonding is typically ionic  !!!!!