Tutton's salt

Tutton's salts are a family of salts with the formula M₂M'(SO₄)₂^.(H₂O)₆. These materials are "double salts," which means that they contain two different cations, M⁺ and M'²⁺. Examples of some Tutton salts, M = NH₄⁺ and M' = V²⁺ and Cu²⁺.^[1] Related to the Tutton's salts are the alums, which are also double salts but with the formula MM'(SO₄)₂^.(H₂O)₁₂. Such salts were of historical importance because they were obtainable in high purity and served as reliable reagents and spectroscopic standards.

References

1. ^ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.