Results 21 to 30 of about 54,663 (257)

Spectroscopic, Raman, EMPA, Micro-XRF and Micro-XANES Analyses of Sulphur Concentration and Oxidation State of Natural Apatite Crystals

open access: yesCrystals, 2020
Sulphur is the third most abundant volatile element in deep Earth systems. Analytical methods for accurately and efficiently determining the sulphur content and oxidation state in natural minerals are still lacking.
Bo Xu   +4 more
doaj   +1 more source

Production, by co-grinding in a media mill, of porous biodegradable polylactic acid-apatite composite materials for bone tissue engineering [PDF]

open access: yes, 2009
This paper presents the results of a study of the production of porous biodegradable composite materials by co-grinding, followed by scaffolding. Dry powders of polylactic acid and nanocrystalline carbonated apatite, analogous to bone mineral were co ...
Combes, Christèle   +6 more
core   +1 more source

Validity of the Apatite/Merrillite Relationship in Evaluating the Water Content in the Martian Mantle: Implications from Shergottite Northwest Africa (NWA) 2975

open access: yesGeosciences, 2017
Phosphates from the Martian shergottite NWA 2975 were used to obtain insights into the source and subsequence differentiation of the melt/melts.
Ewa Słaby   +5 more
doaj   +1 more source

Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore

open access: yesFrontiers in Materials, 2020
The phosphate ore flotation is achieved through the surface electrical behavior difference among apatite, dolomite and quartz, but it is usually affected by the dissolved ions from pulp, especially Ca2+ and Mg2+. The zeta potentials of apatite, dolomite,
Fang Zhou   +5 more
doaj   +1 more source

Synthesis and solubility of hopeite Zn3(PO4)2·4H2O

open access: yesMineralogia, 2023
Minerals from the phosphate groups are used in environmental engineering as thermodynamically stable vehicles for heavy metals such as zinc. The hopeite Zn3(PO4)2·4H2O was synthesized and characterized by X-ray diffraction and scanning electron ...
Bajda Tomasz   +2 more
doaj   +1 more source

The crystallographic structure of dental enamel and related apatites [PDF]

open access: yes, 1964
PhDSynthetic, biological and mineralogical carbonate-containing apatites have been studied, principally by infra-red absorption spectroscopy (using polarised or unpolarised radiation), The substitution of a carbonate ion for two hydroxyl ions in the ...
Elliott, James Cornelis
core   +4 more sources

Apatite precipitation on a novel fast-setting calcium silicate cement containing fluoride

open access: yesActa Biomaterialia Odontologica Scandinavica, 2016
Aim: Calcium silicate cements are widely used in endodontics. Novel fast-setting calcium silicate cement with fluoride (Protooth) has been developed for potential applications in teeth crowns including cavity lining and cementation.
Bahram Ranjkesh   +5 more
doaj   +1 more source

Impacts of Common Lead on Apatite U-Pb Geochronology by LA-ICP-MS: Assessment and Correction Strategies

open access: yesYankuang ceshi
Apatite is a widespread U-bearing mineral in igneous, metamorphic, and sedimentary rocks. U-Pb geochronology of apatite can provide significant information for constraining magmatic evolution processes and tracing provenance.
Tao LUO   +4 more
doaj   +1 more source

Incorporation of iodine into apatite structure: a crystal chemistry approach using Artificial Neural Network

open access: yesFrontiers in Earth Science, 2015
Materials with apatite crystal structure provide a great potential for incorporating the long-lived radioactive iodine isotope (129I) in the form of iodide (I-) from nuclear waste streams.
Jianwei eWang
doaj   +1 more source

THERMAL HISTORY OF THE GULI PLUTON (NORTH OF THE SIBERIAN PLATFORM) ACCORDING TO APATITE FISSION-TRACK DATING AND COMPUTER MODELING

open access: yesГеодинамика и тектонофизика, 2020
We present the first results of fission-track dating of apatite monofractions from two rock samples taken from the Southern carbonatite massif of the world’s largest alkaline ultrabasic Guli pluton (~250 Ma), located within the Maymecha-Kotuy region of ...
M. S. Myshenkova   +6 more
doaj   +1 more source

Home - About - Disclaimer - Privacy