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Coordination Number

HEXAGONAL CLO...

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HEXAGONAL CLOSE PACKING(HCP) HAS TETRAHEDRAL AS WELL AS OCTAHEDRAL VOIDS. THE TOTAL NO OF OCTAHEDRAL AND TETRAHEDRAL VOIDS PER UNIT CELL ARE 6 AND 12 RESPECTIVELY. THE NO OF TETRAHEDRAL VOIDS COMPLETELY INSIDE THE UNIT CELL(DO NOT HAVE CONTRIBUTION IN ANOTHER UNIT CELL) IS X.THE VALUE OF 2X IS

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