Elements with the hexagonal close-packed crystal structure (packing layers only) include Be, Mg, Ca, Sr, Sc, Y, Ti, Zr, Hf, Tc, Re, Ru, Os, Co, Zn, Cd, and Tl.

    Many structures can be viewed as hexagonal close-packed layers with occupied tetrahedral or octahedral holes between layers:
    Pa Tb Oc Ta Pb Ta Oc Tb Pa

Interdisciplinary Education Group
Materials Research Science and Engineering Center on Nanostructured Interfaces
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This page created by George Lisensky, Beloit College. Last modified January 21, 2008 .