Question

How many sodium ions and chloride ions are present in a unit cell of sodium chloride crystal?

Q: Answer-How many sodium ions and chloride ions are present in a unit cell of sodium chloride crystal? &nb...

i For a crystal of sodium the type if lattice in which it crystallises is Face Centered Cubic fcc. ii The co-ordination number of each sodium ion and chloride ion in the crystal lattice is 66. iii The number of sodium ions and chloride ions present in a unit cell is 4 each. iv The structural arrangement of the sodium chloride crystal is cubic close packing with Cl ions at corners and face centres and Na ions at edge centres and body centre, With respect to Na ion it is octahedral.