# Height of CCP Lattice

Are the height of the Cubic Close packing Lattice and the cubic Hexagonal Close Packing the same? My understanding says that these unit cells are formed by different arrangement of atoms, ABC for CCP and ABAB for HCP and because they are made from two different layers their heights should be different, is it so? And if it is, how do I calculate the Height of a CCP lattice?

(I know how to calculate height for cubic HCP.)

• You can't really compare cell heights because the cells differ geometrically, one is either a hexagonal or a rhombic prisms (depends on convention) and the other is a cube. Mar 5, 2021 at 12:08
• No, the CCP unit cell does not have a height. Mar 5, 2021 at 12:11
• You might have heard that a cubic unit cell is described with only one parameter. Mar 5, 2021 at 12:13
• That's it, then. If you know that parameter, you don't want to know any other parameter that might or might not be called "height". There is no other parameter. Mar 5, 2021 at 12:14
• Also, you seem to have a wrong picture concerning the distances between layers. In fact, they are related to the cell height in HCP, but not in CCP. Mar 5, 2021 at 12:24