Tutton's salt

Tutton's salts are a family of salts with the formula M2M'(SO4)2(H2O)6 (sulfates) or M2M'(SeO4)2(H2O)6 (selenates). These materials are double salts, which means that they contain two different cations, M+ and M'2+ crystallized in the same regular ionic lattice.[1] The univalent cation can be potassium, rubidium, caesium, ammonium (NH4), deuterated ammonium (ND4) or thallium. Sodium or lithium ions are too small. The divalent cation can be magnesium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc or cadmium. In addition to sulfate and selenate, the divalent anion can be chromate (CrO42−), tetrafluoroberyllate (BeF42−), hydrogenphosphate (HPO42−)[2] or monofluorophosphate (PO3F2−). Tutton's salts crystallize in the monoclinic space group P21/a.[3] The robustness is the result of the complementary hydrogen-bonding between the tetrahedral anions and cations as well their interactions with the metal aquo complex [M(H2O)6]2+.

  1. ^ Housecroft, C. E.; Sharpe, A. G. (2008). Inorganic Chemistry (3rd ed.). Prentice Hall. p. 699. ISBN 978-0-13-175553-6.
  2. ^ Ettoumi, Houda; Bulou, Alain; Suñol, Joan Josep; Mhiri, Tahar (November 2015). "Synthesis, crystal structure, and vibrational study of : A new metal hydrogenphosphate compound". Journal of Molecular Structure. 1099: 181–188. Bibcode:2015JMoSt1099..181E. doi:10.1016/j.molstruc.2015.06.060.
  3. ^ Bosi, Ferdinando; Belardi, Girolamo; Ballirano, Paolo (2009). "Structural features in Tutton's salts K2[M2+(H2O)6](SO4)2, with M2+ = Mg, Fe, Co, Ni, Cu, and Zn". American Mineralogist. 94 (1): 74–82. Bibcode:2009AmMin..94...74B. doi:10.2138/am.2009.2898. S2CID 97302855.