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  • Hello, while studying crystalline solid structure one thing i don't understand. What does the "basis" means. Lattice seems clear but the basis comes along with problem. The problem arise in this case :

    CsCl structure is not BCC (Body Centered Cubic). It is SC (Simple Cubic) with two basis.

    That what says in the book.

    My question is, if i consider CsCl is not BCC and it can be represented by SC with two basis (CS+ and Cl-) then why can't we imagine or consider original BCC structure as a combination of SC with two basis (two Fe atoms). But it is clearly declared that BCC is an unique Bravis lattice.

    Can anyone clear me out?
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  • Ramani Aswath

    Member • Oct 4, 2011

    <a href="https://www.crystallattice.org/" target="_blank">[video=youtube;wJ1s-Ztxuzg]https://www.youtube.com/watch?v=wJ1s-Ztxuzg[/video]#-Link-Snipped-#

    Bravais Lattices


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  • u_know_who

    Member • Oct 4, 2011

    Thanks for the video but it does not give my answer.
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  • Ramani Aswath

    Member • Oct 4, 2011

    Please see under 'Interpenetrating simple cubic (caesium chloride) structure' here:
    <a href="https://en.wikipedia.org/wiki/Cubic_crystal_system" target="_blank" rel="nofollow noopener noreferrer">Cubic Crystal System</a>
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  • u_know_who

    Member • Oct 4, 2011

    Thank you bioramani.
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