(NH4)Mg(HSO4)(SO4)(H2O)2 and NaSc(CrO4)2(H2O)2, two crystal structures com­prising kröhnkite-type chains, and the temperature-induced phase transition (NH4)Mg(HSO4)(SO4)(H2O)2 \rightleftharpoons (NH4)MgH(SO4)2(H2O)2

Weil, M.; Kolitsch, U.

doi:10.1107/S2053229621001650

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 3
The crystal structure of (NH₄)Mg(HSO₄)(SO₄)(H₂O)₂ at 100 K in a projection along [ $[\overline{1}]$ 10]. [MgO₄(OH₂)₂] octahedra are blue, SO₄ tetrahedra are red, SO₃(OH) tetrahedra are orange and ammonium groups are green. The strong hydrogen bond between the SO₃(OH) and SO₄ tetrahedra is indicated by green lines, hydrogen bonds involving water molecules by white lines and those involving the ammonium cations by yellow lines. Displacement ellipsoids are drawn at the 74% probability level.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 77| Part 3| March 2021| Pages 144-151

https://doi.org/10.1107/S2053229621001650

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