Solid StateMedium
Question
The distance between adjacent, oppositely charged ions in rubidium chloride is 3.285 A0; in potassium chloride is 3.139 A0; in sodium bromide is 2.981 A0 and in potassium bromide is 3.293 A0. The distance between adjacent oppositely charged ions in rubidium bromide is
Options
A.3.147 A0
B.3.385 A0
C.3.393 A0
D.3.493 A0
Solution
(rRb+ + rCl-) + (rK+ + rBr-) - (rK+ + rCl-) = (rRb+ + rBr-)
3.285 + 3.293 - 3.139 = 3.439.
3.285 + 3.293 - 3.139 = 3.439.
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