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Special Issue "Research on Ikaite—Natural Occurrences and Synthetic Mineral Precipitation"
A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Crystallography and Physical Chemistry of Minerals & Nanominerals".
Deadline for manuscript submissions: closed (13 May 2023) | Viewed by 2468
Special Issue Editors
Interests: geochemistry; fluid-rock reactions; carbonates; ikaite; CO2 sequestration
Interests: mineral formation; mineral-water interaction processes; carbonate mineralogy and geochemistry
Special Issue Information
This Special Issue of Minerals focuses on research on the mineral ikaite (CaCO3·6H2O), which despite being metastable is found at several localities around the world. Its formation is linked to aqueous environments, and it precipitates in the whole range of natural aqueous environments from marine to fresh water. Ikaite can precipitate close to the water surface, in sea ice, on the beach and deep within sediments. Oddities such as Greenlandic shrimps and industrial pipelines are other known sites for the growth of ikaite. In general, these localities are characterized by low temperature ranging from below zero to approximately +10 °C. At some localities, ikaite forms solely during the wintertime. Nevertheless, laboratory experiments have found ikaite to precipitate at 25 °C or even higher if certain inhibitors of calcite are present in solution. A great deal of research has focused on the phosphate-inhibiting effects on calcite in connection with ikaite formation, but recent research has shown that other inhibitors of calcite ± aragonite can lead to the precipitation of ikaite, such as the presence of Mg in marine systems. Researchers working on calcium carbonate phases in laboratory experiments often come across ikaite, especially when working at low temperatures as stated above. Because ikaite is a metastable mineral phase at all P-T conditions found on Earth, kinetics is at play when ikaite is forming (i.e., rather than thermodynamics). With this Special Issue, we would like to narrow down what geochemical and perhaps even biogeochemical factors control ikaite formation at localities where ikaite is found in Nature. We must be aware that ikaite might not be the first mineral phase to precipitate, but it could be amorphous calcium carbonate (ACC,) as seen from laboratory experiments. Therefore, it is crucial to add to this Special Issue what these experiments have taught us about the different calcium carbonate phases, and what controls ikaite to form either directly from solution or from ACC, and why ikaite when encountered is favored as a calcium carbonate phase over calcite, aragonite, vaterite, and/or monohydrocalcite(s). For what time intervals can we expect ikaite to remain stable, and what mineral alteration pathways can be expected? As already observed both in nature and in experiments, ikaite does not always transform directly into calcite, but takes other mineral pathways depending on, for example, the chemistry of the aqueous environment or solution, possible temperature or pH changes inflicted on the system, and the rate of these changes. The compiled knowledge of this Special Issue of Minerals will be of importance to anyone working on ikaite and research attempting to use the presence of ikaite or what are believed to be pseudomorphs of ikaite as paleoclimate indicators. A Special Issue on Ikaite is highly called for in order to provide an overview of the multiple factors that can lead to its formation, and what could preserve them to eventually allow them to form pseudomorphs composed of calcite or aragonite.
Dr. Gabrielle J. Stockmann
Dr. Juan Diego Rodríguez-Blanco
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- natural occurrences of ikaite worldwide
- synthetic ikaite mineral precipitation
- (bio-)geochemical controls on ikaite formation
- parameters favouring metastable minerals
- hydrated and amorphous calcium carbonates
- ikaite as a cold-climate paleo indicator