Calcium carbonate phase analysis using XRD and FT-Raman spectroscopy Kontoyannis, Christos G.; Vagenas, Nikos V. Analyst (Cambridge, United Kingdom) ( 2000 ), 125 ( 2 ), 251-255 CODEN: ANALAO ; ISSN: 0003-2654 . ( Royal Society of Chemistry ) There is a need f...
XRD patterns obtained from samples dried by this process showed it was always the mixture of some sharp peaks and two broad traditional humps. All these results indicated that ACC could nucleate spontaneously from amorphous to crystal state under natural conditions. Fig. 1 a XRD patterns for ...
1). The strong peaks for the synthesized solid of XNi = 1.00 (CN-10) were not obviously observed, but its XRD spectrum was consistent with that of the nickel carbonate (NiCO3, the Rhawn’s reagent) (Fig. 1). The synthesized solid phases of XNi = 0.00–0.70 (CN-00–CN-...
XRD results of CaCO3crystals formed in the presence of CMC were presented in Fig.5a. The evident diffraction peaks at 23.08°, 29.40°, 35.96°, 39.40°, 43.16°, 47.48° and 48.52° in the blank CaCO3samples indicated that calcite was the main form of the crystal samples22,56. The XRD...
The sharp XRD peaks at 27.3°, 28.63°, 31.96°, 33.23°, 34.30°, 40.22°, 44.23°, 46.70°, and 52.72° indicate the crystalline phases of HA (Cao et al., 2010). The purest crystalline phase of HA is confirmed by the absence of other forms, such as Ca(OH)2, CaO, β-...
TEM (A), TEM (B), FT-IR (C), and XRD (D) picture of nano-calcium carbonate particles Full size image Characterization of nanoparticle The shape of the NCC was spherical, and the size of the NCC was determined from the TEM (Fig.1A), while the XRD pattern was recorded using Cu kα...
The reflections of different peaks are expressed as numbers. After Raman analysis, the most noticeable carbonate band at 1070 cm−1 and carbonate substitution for phosphate was obtained by zinc oxide-based HAp cements (Toledano et al., 2020a) (Figs. 5 and 2). When carbonated apatite, as ...
Using calcium carbonate as a model, we obtain a large quantity of its oligomers (CaCO3)n with controllable molecular weights, in which triethylamine acts as a capping agent to stabilize the oligomers. The removal of triethylamine initiates crosslinking of the (CaCO3)n oligomers, and thus the ...
The XRD data was also analysed by combining a Williamson–Hall plot with line profile analysis. This method uses the integral breadth as a measure of the peak width and the universal shape factorΦto describe the peak shape variation. These numbers can be determined for single peaks as well ...
b) providing a ground calcium carbonate and/or a precipitated calcium carbonate; c) providing a hydrophobizing agent selected from an aliphatic carboxylic acid having between 5 and 24 carbon atoms; d) contacting the ground calcium carbonate and/or the precipitated calcium carbonate of step b) wit...