La transformation aragontte-calcite dans les coraux fossiles. relation avec la thermoluminescence

Autor:	Michel Bernat, Max Ganteaume, Christian Zahra, Dominique Lapraz, Jean-Emmanuel Bokilo, Philibert Iacconi, Alain Baumer
Rok vydání:	1990
Předmět:	Calcite chemistry.chemical_compound chemistry Aragonite engineering Mineralogy Physical and Theoretical Chemistry engineering.material Condensed Matter Physics Instrumentation Endothermic process Thermoluminescence
Zdroj:	Thermochimica Acta. 170:121-137
ISSN:	0040-6031
Popis:	The aragonite fossil corals exhibit an intense natural thermoluminescence between 300°C and 450°C. The transformation of this biogenic aragonite into calcite begins at 260°C and is completed around 450°C. It is accompanied by a rapid loss of water and a relatively important endothermic phenomenon (dehydration and phase transition). The decarbonation of the sample begins above 550°C. The skeleton of the corals studied holds water whose departure, during heating, seems to induce the aragonite-calcite transition. The latter process and the thermoluminescence phenomena observed are probably linked.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::af259758bcb4d63d202af1c15428ce1e https://doi.org/10.1016/0040-6031(90)80530-c Zobrazit plný text záznamu