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7. A well known mineral fluoride is chemically calcium chloride.It is known 1 unit of this mineral there are 4 Ca^{2+} ions and F^- ions and that Ca^{2+} are arranged in fcc lattice.The F^- ions filled all tetrahedral holes in the fcc of Ca^{2+} ions.the edge length is 5.46 x 10^{-8} cm ; density is 3.18g/cm^3 . Used this to calculate N_A

Answer» 7. A well known mineral fluoride is chemically calcium chloride.It is known 1 unit of this mineral there are 4 Ca^{2+} ions and F^- ions and that Ca^{2+} are arranged in fcc lattice.The F^- ions filled all tetrahedral holes in the fcc of Ca^{2+} ions.the edge length is 5.46 x 10^{-8} cm ; density is 3.18g/cm^3 . Used this to calculate N_A


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