I'm studying basics of Solid State Chemistry from this source.
So there are 14 types of Bravais crystal lattices (Primitive + Centered) in 3D. Every solid in this universe is made by the unit cells of these lattices. OK so far so good.
Later on there was the topic of Close packing and Structure of Metallic Crystals and we are told about hcp /fcc types of structures.
Why do we remain silent about the unit cells and crystal system in this context? It seems like a huge disconnect.
Is there any relation between the Hexagonal Unit cell and hexagonal close packing?