Results 21 to 30 of about 11,894 (252)

Origin of magnetite and apatite ores in the Esfordi magnetite-apatite ore deposit NE of Bafq, south Yazd: insights from mineralogy, geochemistry, microthermometry, O-H stable and U-Pb and Nd-Sm non-stable isotopes

open access: yesJournal of Economic Geology, 2022
Petrographic and mineralogical data indicate the widespread presence of five generations of apatite, two generations of monazite with minor xenotime in the Esfordi deposit.
Kiamars Hosseini   +1 more
doaj   +1 more source

A Study on Apatite from Mesozoic Alkaline Intrusive Complexes, Central High Atlas, Morocco

open access: yesCrystals, 2022
There are abundant phosphate mines in the High Atlas Mountains of Morocco. Gem-quality apatite is produced at the Anemzi deposit, but its associated gem mineralogy is relatively poorly studied.
Pengyu Yuan   +3 more
doaj   +1 more source

Chemical Diversity of Apatites [PDF]

open access: yes, 2006
Apatites can accommodate a large number of vacancies and afford multiple ionic substitutions determining their reactivity and biological properties. Unlike other biominerals they offer a unique adaptability to various biological functions.
Combes, Christèle   +3 more
core   +2 more sources

Triclinic apatites

open access: yesActa Crystallographica Section B Structural Science, 2007
Apatites commonly adopt P63/m hexagonal symmetry. More rarely, monoclinic chemical analogues have been recognized, including the biologically significant hydroxyapatite, Ca10(PO4)6(OH)2, but the driving force towards lower symmetry has not been systematically examined.
Baikie, T   +7 more
openaire   +5 more sources

Bone mineral: update on chemical composition and structure [PDF]

open access: yes, 2009
Bone mineral: update on chemical composition and ...
Combes, Christèle   +3 more
core   +2 more sources

Physico-chemical properties of nanocrystalline apatites: Implications for biominerals and biomaterials [PDF]

open access: yes, 2007
Nanocrystalline apatites play an important role in biomineralisation and they are used as bioactive biominerals for orthopaedic applications. One of the most interesting characteristics of the nanocrystals, evidenced by spectroscopic methods, is the ...
Barroug, Allal   +4 more
core   +6 more sources

Marcasite at the Permian‐Triassic Transition

open access: yesGeophysical Monograph Series, Page 377-399., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Elena Lounejeva   +7 more
wiley  

+6 more sources

Simultaneous incorporation of magnesium and carbonate in apatite: effect on physico-chemical properties [PDF]

open access: yesMaterials Research, 2013
Synthetic apatites are widely used both in the dental and the orthopaedic fields due to their similarity in composition with the inorganic phase of hard tissues.
Marcia S. Sader   +3 more
doaj   +3 more sources

Detrital zircon and apatite (U‐Th)/He geochronology of intercalated baked sediments: a new approach to dating young basalt flows [PDF]

open access: yes, 2011
Simple numerical models suggest that many basaltic lava flows should sufficiently heat the sediments beneath them to reset (U‐Th)/He systematics in detrital zircon and apatite.
Aciego   +32 more
core   +2 more sources

Biomimetic apatite sintered at very low temperature by spark plasma sintering: Physico-chemistry and microstructure aspects [PDF]

open access: yes, 2010
Nanocrystalline apatites analogous to bone mineral are very promising materials for the preparation of highly bioactive ceramics due to their unique intrinsic physico-chemical characteristics.
Champion, Eric   +8 more
core   +3 more sources

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