**Hexagonal close-packed (hcp)** structure has coordination number:
A6
B8
C10
D12
Answer & Solution
Correct answer: D. 12
Like fcc, hcp has CN = 12. (Both fcc and hcp are 'closest-packed' with the maximum possible packing efficiency of 74%.) Examples: Zn, Mg, Cd (hcp); Cu, Au, Ag (fcc).
Related questions
Ionic solids must always maintain:Vacancy and interstitial defects are shown by solids that are:An interstitial defect changes the density of a substance by:Particles occupying an interstitial site give a defect that is:A cell with extra particles on two opposite faces is:A cell with an extra particle at the centre of every face is:A cell with one extra particle at its centre is called:Centred unit cells come in how many types?