Infrared spectroscopic investigations of the calcite-rhodochrosite and parts of the calcite-magnesite mineral series     

M. E. Böttcher  P.-L. Gehlken  E. Usdowski 《Contributions to Mineralogy and Petrology》1992,109(3):304-306

The infrared spectroscopic measurements of synthetic and natural carbonate samples show that significant frequency shifts in the v2 and v4 vibrational bands of the carbonate ion group occur in the calcite-rhodochrosite and calcite-magnesite mineral series as a function of the chemical composition. These shifts are due to cationic substitution, reflecting the different ionic raddii and masses of the end-members. A tentative model for the variations of v2 and v4 in the ternary system CaCO₃–MnCO₃–MgCO₃ is presented.  相似文献   

BaMn[CO3]2 – a previously unrecognized double carbonate in low-temperature environments: Structural,spectroscopic, and textural tools for future identification     

Michael E. Böttcher  Herta S. Effenberger  Peer-Lennart Gehlken  Georg H. Grathoff  Burkhard C. Schmidt  Patrizia Geprägs  Rainer Bahlo  Olaf Dellwig  Thomas Leipe  Vera Winde  André Deutschmann  Alexander Stark  David Gallego-Torres  Francisca Martinez-Ruiz 《Chemie der Erde / Geochemistry》2012,72(1):85-89

Following a tentative evidence for the occurrence of low-temperature barium manganese(II) carbonates in brackish sediments of the Baltic Sea, a stoichiometric double carbonate, BaMn[CO₃]₂, was synthesized from aqueous solutions at ambient temperature for the first time. Here we report the results of a multi-method approach, including scanning electron microscopy (SEM–EDX) investigations, the chemical composition, and, in particular, the diagnostic powder X-ray diffraction pattern, as well as diagnostic parts of the FT infrared absorption and Raman spectra for future identification of this new carbonate in low-temperature environments, like brackish sediments.  相似文献