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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
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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
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