TY  - JOUR
A1  - Rincke, Christine
A1  - Schmidt, Horst
A1  - Buth, Gernot
A1  - Voigt, Wolfgang
T1  - Crystal structure and characterization of magnesium carbonate chloride heptahydrate
Y1  - 2020
VL  - 76
IS  - 8
SP  - 741
EP  - 745
JF  - Acta Crystallographica Section C
DO  - 10.1107/S2053229620008153
DO  - 10.23689/fidgeo-5161
N2  - MgCO3·MgCl2·7H2O is the only known neutral magnesium carbonate containing chloride ions at ambient conditions. According to the literature, only small and twinned crystals of this double salt could be synthesised in a concentrated solution of MgCl2. For the crystal structure solution, single-crystal diffraction was carried out at a synchrotron radiation source. The monoclinic crystal structure (space group Cc) exhibits double chains of MgO octahedra linked by corners, connected by carbonate units and water molecules. The chloride ions are positioned between these double chains parallel to the (100) plane. Dry MgCO3·MgCl2·7H2O decomposes in the air to chlorartinite, Mg2(OH)Cl(CO3)·nH2O (n = 2 or 3). This work includes an extensive characterization of the title compound by powder X-ray diffraction, thermal analysis, SEM and vibrational spectroscopy.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9507
ER  -