title: The solid solution Na(0.39)(NH(4))(1.61)SO(4)·Te(OH)(6).
abstract: The title compound, sodium ammonium sulfate-telluric acid (1/1), Na(0.39)(NH(4))(1.61)SO(4)·Te(OH)(6), is isostructural with other solid solutions in the series M(1-x)(NH(4))(x)SO(4)·Te(OH)(6), where ammonium is partially replaced with an alkali metal (M = K, Rb or Cs). The structure is composed of planes of Te(OH)(6) octa-hedra alternating with planes of SO(4) tetra-hedra. The Na(+)/NH(4) (+) cations are statistically distributed over the same position and are located between the planes. The structure is stabilized by O-H⋯O and N-H⋯O hydrogen bonds between the telluric acid adducts and the O atoms of sulfate groups, and between the ammonium cations and O atoms, respectively. Both Te atoms lie on centres of symmetry.
authors.forename: Lilia
authors.initials: L
authors.lastname: Ktari
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdelhedi
authors.forename: Mohamed
authors.initials: M
authors.lastname: Dammak
authors.forename: Alain
authors.initials: A
authors.lastname: Cousson
authors.forename: Abdelwaheb
authors.initials: A
authors.lastname: Kolsi