(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 1
The hk1 plane of reciprocal space of (NH₄)Mg(HSO₄)(SO₄)(H₂O)₂ [100 K data in parts (a)/(b)] and of (NH₄)MgH(SO₄)₂(H₂O)₂ [296 K data in part (c)] reconstructed from CCD data. (a) The small cell with matching reflections is marked with orange circles; no superstructure reflections are visible. (b) The actual supercell with matching reflections is marked with green circles. (c) The actual small cell is marked with orange circles without superstructure reflections.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

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

https://doi.org/10.1107/S2053229621001650

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