I was reading about Bravias lattices(cubic crystal system) when got confused about an article in my book.

Please refer to Counting body center as lattice point when basis consists of 2 atoms.

The answer there makes me think about these two cases:- fig1 fig2 In figure 1, the crystal is produced by conbining the body centered lattice frame with a single atom motif.

In figure 2, the crystal lattice is produced by combining a primitive cubic lattice frame with a motif made of 2 atoms.

Both things lead to that same result so would we calk the final crystal formed a a body centered cubic lattice or a primitive cubic lattice?

P.S : The book I am using(a private institution book, tution book to be precise) has unclear definitions creating a lot of problem so pardon me if you had found me saying weird things.


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