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Saturday, 26 March 2016

CRYSTAL STRUCTURE FOR METALLIC ELEMENTS

          The crystals of most metals have highly closed symmetrical structure with closed packed atoms. The most common types of space lattice (or unit cell) with which metallic elements crystallise are given below:
4. Hexagonal closed pack structure (HCP).


Crystal type
Example
(1) Simple cubic
(2) B.C.C 

     (3) F.C.C  
(4) H.C.P
     Polonium
    α-iron, γ-iron, Na, vanadium, Chromium, Molybdenum
     γ-iron, Al, Cu, Ag, gold, Lead, Pt
     Mg, Zn, Cd, zirconium, titanium

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