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Packing refers to the arrangement of constituent units in such a way that the forces of attraction among the constituent particles is maximum and the constituents occupy the maximum available space. In two -dimensions ,there are square close packing and hexagonal close packing .In three- dimensions ,however, there are hexagonal close packing, cubic close packing and body-centered cubic packing. (i) hcp:AB AB AB AB ..... arrangement ""coordination no. = 12 "" % occupied space = 74 (ii) ccp:ABC ABC.... arrangement "" coordination no. = 12 ""% occupied space = 74 bcc:68% space is occupied ""coordination no.= 8 Which type of stacking pattern is found insodium chloride 's crystal lattice? |
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Answer» AB AB |
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