Web6 mei 2013 · Biological apatite shows its unique chemical compositions in two aspects, that is, the lacking of anticipatory hydroxyl group and the existence of [ 34 ]. For hydroxyl group, it was reported that only a few percentage of the predicated concentration was detected in … Web1 apr. 2003 · The temperatures of exothermic effect at 330-340°C and of decomposition of carbonate and sulfate apatites at 650-950°C were shown to depend on the substitutions …
Thermal analysis of apatite structure Request PDF - ResearchGate
WebThe TGA data also showed that the thermal decomposition of the obtained CAp species involved step-by-step dehydration and CO 2 elimination. Furthermore, sintering of the … Web22 okt. 2012 · In order to obtain the properties of the sintered as-dried calcium phosphate with [Ca]/[P] = 1.50, the characteristics of sintered pellets have been investigated using X-ray diffraction (XRD), inductively coupled plasma-mass spectrometry (ICP-MS), Fourier-transform infrared (FT-IR) spectra, Vickers hardness indentation and scanning electron … toddy maker instructions
Minerals Free Full-Text Geochemical Evidence of Ediacaran …
WebApatite bearing banded iron formation units developed in an environment influenced by hydrothermal fluids , which may have provided a source of chlorine that contributed to apatite formation. Positive Eu anomaly in REE patterns of hydroxylapatite AL10-2 is evidence for hydrothermal input in its crystallization environment [ 22 , 27 , 91 , 92 ]. Web1 mrt. 2016 · Apatite formed in the late-stages of carbonatite emplacement is of particular interest due to its propensity for a HREE content (where HREE includes Eu–Lu + Y; Wall 2014).This type of apatite is uncommon, but has been described in carbonatite complexes at Tundulu, Kangankunde, and Songwe, Malawi; Sukulu, Uganda; and Juquiá, Brazil … Web1 apr. 2012 · The hydrothermal decomposition of alkali lignin was performed in a 4576A-type batch reactor (Parr, USA). 5 g of alkali lignin and 95 g of water were used in each run. The hydrothermolysis was conducted at temperatures of 553, 643, 653 and 663 K. The reaction was stopped once the intended temperature was reached (zero holding toddy machinery maintenance