(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 6
The kröhnkite-type chain in the crystal structure of NaSc(CrO₄)₂(H₂O)₂. [ScO₄(OH₂)₂] octahedra are blue and CrO₄ tetrahedra are yellow. Displacement ellipsoids are drawn at the 74% probability level and H atoms are given as grey spheres of arbitrary radius. [Symmetry codes: (i) x, −y + 1, z + $[{1\over 2}]$ ; (ii) x, y + 1, z; (iii) x, −y + 1, z − $[{1\over 2}]$ ; (iv) −x + $[{1\over 2}]$ , −y + $[{1\over 2}]$ , −z.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

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

https://doi.org/10.1107/S2053229621001650

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