{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["10(1)"],"submitter":["Tollefsen E"],"pubmed_abstract":["Glendonites have been found worldwide in marine sediments from the Neoproterozoic Era to the Quaternary Period. The precursor of glendonite, ikaite (CaCO<sub>3</sub> · 6H<sub>2</sub>O), is metastable and has only been observed in nature at temperatures <7 °C. Therefore, glendonites in the sedimentary record are commonly used as paleotemperature indicators. However, several laboratory experiments have shown that the mineral can nucleate at temperatures>7 °C. Here we investigate the nucleation range for ikaite as a function of temperature and pH. We found that ikaite precipitated at temperatures of at least 35 °C at pH 9.3 -10.3 from a mixture of natural seawater and sodium carbonate rich solution. At pH 9.3, we observed pseudomorphic replacement of ikaite by porous calcite during the durati"],"journal":["Scientific reports"],"pagination":["8141"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC7235076"],"repository":["biostudies-literature"],"pubmed_title":["Ikaite nucleation at 35 °C challenges the use of glendonite as a paleotemperature indicator."],"pmcid":["PMC7235076"],"pubmed_authors":["Skelton A","Bruchert V","Lee CC","Tollefsen E","Balic-Zunic T","Morth CM"],"additional_accession":[]},"is_claimable":false,"name":"Ikaite nucleation at 35 °C challenges the use of glendonite as a paleotemperature indicator.","description":"Glendonites have been found worldwide in marine sediments from the Neoproterozoic Era to the Quaternary Period. The precursor of glendonite, ikaite (CaCO<sub>3</sub> · 6H<sub>2</sub>O), is metastable and has only been observed in nature at temperatures <7 °C. Therefore, glendonites in the sedimentary record are commonly used as paleotemperature indicators. However, several laboratory experiments have shown that the mineral can nucleate at temperatures>7 °C. Here we investigate the nucleation range for ikaite as a function of temperature and pH. We found that ikaite precipitated at temperatures of at least 35 °C at pH 9.3 -10.3 from a mixture of natural seawater and sodium carbonate rich solution. At pH 9.3, we observed pseudomorphic replacement of ikaite by porous calcite during the durati","dates":{"release":"2020-01-01T00:00:00Z","publication":"2020 May","modification":"2025-04-19T14:25:17.28Z","creation":"2020-05-30T07:04:46Z"},"accession":"S-EPMC7235076","cross_references":{"pubmed":["32424173"],"doi":["10.1038/s41598-020-64751-5"]}}