Ball-and-spoke structural model of the unit cell of a sodium chloride crystal, NaCl (table salt). Permanently mounted on a clear square acrylic base. Clearly shows the two interpenetrating face centered cubic lattices of sodium and chloride ions. The model contains 27 balls, each 22mm in diameter. Dimensions: cube side 14cm, overall height 18cm. Additional Info: Ball-and-spoke structural model of the unit cell of a sodium chloride crystal, nacl (table salt). Permanently mounted on a clear square acrylic base. Dimensions: cube side 14cm, overall height 18cm. Package Size(L x W x H): 7.5 X 7.5 X 7.5 (IN) Categories: Atomic Structure, Models HTS Code: 9023.00.0000 UNSPSC: 6.01045e+007 Country Of Origin: CHINA