Results 141 to 150 of about 3,135 (181)

Mineralogy of carbonate fluorapatites

Journal of the Geological Society, 1980
The principal phosphate mineral in sedimentary phosphorites is carbonate fluorapatite of the variety francolite. Francolites exhibit several systematic isomorphous substitutions including sodium and magnesium for calcium, carbonate for phosphate, fluorine for oxygen, and hydroxyl for fluorine.
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Thermoluminescence in Fluorapatite Doped with Eu2O3 and PbO

Radiation Protection Dosimetry, 2002
Thermoluminescence (TL) of fluorapatite Ca5(PO4)3F doped with Eu2O3 has been investigated for UV and X ray irradiation. Two TL glow peaks for the Eu2O3 doped sample appeared in the temperature regions about (1) 353 to 380 K and (2) 508 to 510 K, when heated at rate of 20 K.min(-1) after UV or X ray irradiation at room temperature.
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Structure of Interfacial Water on Fluorapatite (100) Surface

Langmuir, 2008
The structure relaxation mechanism of the fluorapatite (100) surface under completely hydrated ambient conditions has been investigated with the grazing incidence X-ray diffraction (GIXRD) technique. Detailed information on lateral as well as perpendicular ordering corresponding to the water molecules and atomic relaxations of the (100) surface of ...
Pareek, A., Torrelles, X., Angermund, K., Rius, J., Magdans, U., Gies, H.   +5 more
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High pressure behavior of natural fluorapatite and carbonate-fluorapatite

2014
Knowledge of the mineral-physics of apatite helps to assess the geological implications of its actual stability field, but also its mechanical properties - useful for its technological applications. Changes in its chemical and physical properties are observed when carbonate is incorporated into the apatite structure.
CURETTI, Nadia, CAMARA ARTIGAS, Fernando, BENNA, Piera, Ferraris C.   +3 more
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Dislocation structure of calcium fluorapatite

Soviet Physics Journal, 1978
Using etching of single crystals of calcium fluorapatite (FAP), we investigated the geometry of the distribution of dislocations emerging to the face surfaces, and the crystallography of their slip. It was shown that the application of a constant electric field of fixed orientation with respect to the crystal planes leads to motion of the dislocations.
L. N. Aleksandrov, V. D. Zolotkov, V. S. Mordyuk   +2 more
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Biomimetic Synthesis of Fluorapatite Coating

Advanced Materials Research, 2011
In the present study, a simple method of regenerating microstructure of human tooth under near-physiological conditions (pH 7.0, 37 °C, 1 atm) was developed. Commercial gelatin was used as matrix materials in this method, which nucleated the formation of fluorapatite (FA) nanocrystals and regulated the growth of nanocrystals. As a result, the resulting
Hong You Wang, Kang Ning Sun, Ting Shan, Xiu Qing Yang, Yan Zhao, Yan Jie Liang   +5 more
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The synthesis and solubility of carbonate fluorapatite

American Journal of Science, 1984
Solubility of laboratory synthesized carbonate fluorapatite (CFAP) determined from supersaturated and undersaturated initial conditions. A constant composition technique was used to synthesize the CFAP resulting in solids that appear to be homogeneous, crystalline, and of accurately known stoichiometry.
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IR-spectra of fluorapatite and fluorchlorapatite

Experientia, 1967
Es wird eine Zuordnung der IR-Absorptionsbanden zu den Tetraederschwingungen des PO4-Tetraeders in Apatit gegeben.
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fluorapatite, n.

2023
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Effect of Al3+ and Mg2+ on the Flotation of Fluorapatite Using Fatty- and Hydroxamic-Acid Collectors – A Multiscale Investigation

Applied Surface Science, 2022
Aldo H Romero, Amir Eskanlou, Qingqing Huang   +2 more
exaly