Unit Cells The basic repeating unit of a crystalline solid.Any of the unit cells,when repeated in space in all three dimensions,forms the lattice structure characteristic of a crystalline solid. The essentials of unit cells: 1.unit cell dimension and shape: cell parameters:a,b,c, and a,B,Y. a,b,c Hexahedral length, a,B,y is the be,ca,ab a composed of AngleUnit Cells ： The basic repeating unit of a crystalline solid. Any of the unit cells, when repeated in space in all three dimensions, forms the lattice structure characteristic of a crystalline solid. cell parameters: a，b，c， and α，β，γ. a，b，c Hexahedral length， α，β，γ is the bc ， ca , ab composed of Angle The essentials of unit cells： 1. unit cell dimension and shape：