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A new hydrate of magnesium carbonate, MgCO 3 ·6H 2 O
Author(s) -
Rincke Christine,
Schmidt Horst,
Voigt Wolfgang
Publication year - 2020
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229620001540
Subject(s) - hydrate , magnesium , carbonate , raman spectroscopy , octahedron , aqueous solution , inorganic chemistry , chemistry , crystal structure , crystallography , mineralogy , organic chemistry , physics , optics
During investigations of the formation of hydrated magnesium carbonates, a sample of the previously unknown magnesium carbonate hexahydrate (MgCO 3 ·6H 2 O) was synthesized in an aqueous solution at 273.15 K. The crystal structure consists of edge‐linked isolated pairs of Mg(CO 3 )(H 2 O) 4 octahedra and noncoordinating water molecules, and exhibits similarities to NiCO 3 ·5.5H 2 O (hellyerite). The recorded X‐ray diffraction pattern and the Raman spectra confirmed the formation of a new phase and its transformation to magnesium carbonate trihydrate (MgCO 3 ·3H 2 O) at room temperature.