In-situ Raman spectroscopy of amorphous calcium phosphate to crystalline hydroxyapatite transformation

Autor: Jessica A. Stammeier, Bettina Purgstaller, Dorothee Hippler, Vasileios Mavromatis, Martin Dietzel

Publikováno v: MethodsX, Vol 5, Iss , Pp 1241-1250 (2018)

Amorphous calcium phosphate (Ca3(PO4)2xnH2O; n = 3–4.5; ACP) is a precursor phase of the mineral hydroxyapatite (Ca5(PO4)3(OH); HAP) that in natural settings occurs during both authigenic and biogenic mineral formation. In aqueous solutions ACP tra

Externí odkaz: https://doaj.org/article/fd83d3cf84fe4d5bab0c9a37ac763418

Oxygen and clumped isotope fractionation during the formation of Mg calcite via an amorphous precursor

Autor: Bettina Purgstaller, Martin Dietzel, Tobias Kluge, Vasileios Mavromatis, Albrecht Leis

Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2020, 276, pp.258-273. ⟨10.1016/j.gca.2020.02.032⟩
Geochimica et Cosmochimica Acta, 2020, 276, pp.258-273. ⟨10.1016/j.gca.2020.02.032⟩
Geochimica et cosmochimica acta, 276, 258–273
Dietzel, Martin; Purgstaller, Bettina; Kluge, Tobias; Leis, Albrecht; Mavromatis, Vasileios (2020). Oxygen and clumped isotope fractionation during the formation of Mg calcite via an amorphous precursor. Geochimica et cosmochimica acta, 276, pp. 258-273. Elsevier Science 10.1016/j.gca.2020.02.032

The oxygen and clumped isotope signatures of Mg calcites are routinely used as environmental proxies in a broad range of surroundings, where Mg calcite forms either by classical nucleation or via an amorphous calcium magnesium carbonate (ACMC) precur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c12997d1be5b71adfef092bb55a0e0b
https://doi.org/10.1016/j.gca.2020.02.032

Boron isotope fractionation during the formation of amorphous calcium carbonates and their transformation to Mg-calcite and aragonite

Autor: Laeticia Faure, Bettina Purgstaller, Vasileios Mavromatis, V. Montouillout, Jacques Schott, Pascale Louvat, Jérôme Gaillardet

Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2021, 315, pp.152-171. ⟨10.1016/j.gca.2021.08.041⟩
Geochimica et Cosmochimica Acta, 2021, 315, pp.152-171. ⟨10.1016/j.gca.2021.08.041⟩

The non-classical crystallization pathway of carbonate minerals proceeds through the initial formation of an amorphous precursor phase and commonly takes place during biomineralization. Although the isotopic composition of marine calcifiers is often

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e73c7a1794b02aaa5e045bc48629e6f
https://hal.archives-ouvertes.fr/hal-03408229/document

Paired Δ47 and Δ48 carbonate clumped isotope data: Standard values, multi-instrument comparisons, mixing effects, and disequilibrium effects

Autor: Martin Dietzel, Aradhna Tripati, Bettina Purgstaller, Robert A. Eagle, Hannah Carroll, Jamie Lucarelli

Publikováno v: Goldschmidt2021 abstracts.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f06e5e16f284725700d52bd8ff2327c
https://doi.org/10.7185/gold2021.7805

Investigating the reaction pathway of crystalline orthocalciumphosphate formation via amorphous precursors in respect to different pH, Ca/P ratios and Mg presence

Autor: Thomas Schnedlitz, Bettina Purgstaller, Dorothee Hippler

The crystallization pathways of amorphous into crystalline orthocalciumphosphate phases is a widely discussed topic, with processes not yet entirely understood. Current research focuses on medical applications as well as natural sedimentary systems,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::767c369704b0f172970a15cd5da2520c
https://doi.org/10.5194/egusphere-egu2020-20510