JOURNAL of the Tunisian Chemical Society

The new title compound, K_3,44(NH₄)_0,56Se₂Mo₅O₂₁.2H₂O, has been synthesized in aqueous solution and characterized by elemental analysis, M.E.B, thermogravimetric analysis, I.R and single-crystal X-ray diffraction. It crystallizes in monoclinic system with P2₁/n space group. The parameters are a = 9,911(2) Å, b = 23,350(6) Å, c = 10,501(2) Å, β = 114,10(2)° and Z = 4. Its structure is characterized by the presence of the Standberg type clusters [Se₂Mo₅O₂₁]^4- linked to each other to a three dimensional network by monovalent cations K⁺ and NH₄⁺ and water molecules.

I. Nagazi, R. Ben Smail, A. Haddad

selenomolybdate, polyoxometallate, heteropolyanion, Strandberg, crystal structure

Pages 61-74