A new hydrate of magnesium carbonate, MgCO3·6H2O. Issue 3 (13th February 2020)

• Record Type: Journal Article
• Authors: Rincke, Christine; Schmidt, Horst; Voigt, Wolfgang
• Is Part Of: Acta crystallographica. Volume 76:Issue 3(2020)
• Page Start: 244
• Page End: 249
• Publication Date: 2020-02-13
• Subjects: magnesium -- carbonate -- low‐temperature hydrate -- Raman spectroscopy -- crystal structure; Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229620001540
• Languages: English
• ISSNs: 2053-2296

Abstract

Abstract : The formation of a previously unknown higher hydrated magnesium carbonate, MgCO3 ·6H2 O, was confirmed. Its crystal structure differs from the other known magnesium carbonates significantly, but it exhibits similarities to NiCO3 ·5.5H2 O. Abstract : During investigations of the formation of hydrated magnesium carbonates, a sample of the previously unknown magnesium carbonate hexahydrate (MgCO3 ·6H2 O) was synthesized in an aqueous solution at 273.15 K. The crystal structure consists of edge‐linked isolated pairs of Mg(CO3 )(H2 O)4 octahedra and noncoordinating water molecules, and exhibits similarities to NiCO3 ·5.5H2 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 (MgCO3 ·3H2 O) at room temperature.