Identification of biogenetic calcite and aragonite using SEM
نویسندگان
چکیده
منابع مشابه
Fabrication of Single-Crystalline Calcite Needle-Like Particles Using the Aragonite–Calcite Phase Transition
Calcium carbonate (CaCO3) occurs in two major polymorphs: rhombohedral calcite and orthorhombic aragonite, the latter is thermodynamically metastable. In this study, we first prepared aragonite needle-like particles by introducing CO2-containing gas into Ca(OH)2 aqueous slurry. Then, the resulted aragonite particles were heat treated at 500 ◦C for 1 h, in order to induce the aragonite–calcite p...
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In this study, the sorption behavior of Zn2+ on calcite, kaolinite, and clinoptilolite, in addition to mixtures of calcite with kaolinite and clinoptilolite, was investigated at various loadings and mixture compositions using atomic absorption spectroscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy, X-ray powder diffraction, and Fourier transform infrared techniques. Acc...
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Understanding the partitioning of aqueous boron species into marine carbonates is critical for constraining the boron isotope system for use as a marine pH proxy. Previous studies have assumed that boron was incorporated into carbonate through the preferential uptake of tetrahedral borate B(OH)4 . In this study we revisit this assumption through a detailed solid state B magic angle spinning (MA...
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15 صفحه اولRailsback's Some Fundamentals of Mineralogy and Geochemistry X-ray diffraction (XRD) of aragonite and calcite
Dickinson and McGrath (2001, The Analyst 126, 1118–1121) used the ratio of integrated peak areas (not heights) of the calcite 104 and aragonite 221 peaks to develop a quantitative relationship for ratio of aragonite to calcite. That approach yields good quantitative results, if with the somewhat unsettling proviso that a 50-50 mixture of the two ploymorphs has a 104/221 intensity ratio much gre...
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ژورنال
عنوان ژورنال: Geologia Croatica
سال: 2009
ISSN: 1330-030X,1333-4875
DOI: 10.4154/gc.2009.14