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If the radii of Mg^(2+), Cs^(o+), O^(2-)...

If the radii of `Mg^(2+), Cs^(o+), O^(2-), S^(2-)`, and `CI^(Θ)` ions are `0.65, 1.69, 1.40, 1.84`, and `1.81 Å`, respectively, calculate the coordination number of the cation in the crystals of `MgS, MgO`, and `C_(s)CI`.

Text Solution

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`CN` fo `MgS`
a. `(Mg^(2+))/(S^(2-)) = (0.65)/(1.84) = 0.35`
(Range lies between `0.225` and `0414`)
`:. CN = 4`
b. In `MgO: (Mg^(2+))/(O^(2-)) = (0.65)/(1.40) = 0.48`
(Range lies between `0.414` and `0.732`)
`:. CN = 6`
c. In `C_(s)Cl = (Cs^(o+))/(Cl^(Θ)) - (1.69)/(1.81) = 0.93`
(Range lies between `0.732` and `1`)
`:. CN = 8`
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