Formation condition of monohydrocalcite from CaCl2–MgCl2–Na2CO3 solutions

Nishiyama, Risa; Munemoto, Takashi; Fukushi, Keisuke

doi:10.1016/j.gca.2012.09.002

Cited by 80 publications

(93 citation statements)

References 40 publications

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“…In this respect our experimental results, which indicate that a magnesium to calcium ratio of 10 or more is required for CaCO3·H2O formation, are in keeping with the previous findings of Nishiyama et al (2013). The disappearance of monohydrocalcite is coincident with the widespread onset of nesquehonite precipitation, suggesting that the latter process is coincident with CaCO3·H2O dehydration.…”

Section: Behaviour Of Calcium Carbonate Phasessupporting

confidence: 92%

“…It has been observed (Nishiyama et al, 2013) that monohydrocalcite formation concurrent with nesquehonite requires the presence of 22 magnesium in solution and more CO3 2-than Ca 2+ (aq) because the high hydration energy of magnesium prevents quick CaCO3·H2O dehydration to anhydrous calcium carbonate.…”

Section: Behaviour Of Calcium Carbonate Phasesmentioning

confidence: 99%

“…The disappearance of monohydrocalcite is coincident with the widespread onset of nesquehonite precipitation, suggesting that the latter process is coincident with CaCO3·H2O dehydration. It has been suggested that CaCO3·H2O forms via the transformation of a calcium-rich hydrated magnesium-bearing amorphous carbonate precursor (Nishiyama et al, 2013) (Bonales et al, 2013).…”

Section: Behaviour Of Calcium Carbonate Phasesmentioning

confidence: 99%

“…Instead, a variety of partially characterized temperature sensitive basic and hydrated magnesium carbonates exist, which in at least some experimental settings appear to be the product of parallel reaction pathways (e.g., Hopkinson et al, 2012). In association with these phases other studies show that the presence of magnesium in solution may suppress calcite formation, facilitate aragonite precipitation (e.g., Park et al, 2008;Hu et al, 2009) (Nishiyama et al, 2013). Hence comparatively little is known of the parameters that control the nature of the relationships between calcium and magnesium metastable reaction products, although it seems likely that variation in the [Mg 2+ (aq) : Ca 2+ (aq)] ratio and seeding solutions with carbonate minerals are two parameters likely to exert strong control on mineral paragenesis.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Carbonate mineral paragenesis and reaction kinetics in the system MgO–CaO–CO 2 –H 2 O in presence of chloride or nitrate ions at near surface ambient temperatures

Kristová

Hopkinson

Rutt

et al. 2014

Applied Geochemistry

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Section: Behaviour Of Calcium Carbonate Phasessupporting

confidence: 92%

Section: Behaviour Of Calcium Carbonate Phasesmentioning

confidence: 99%

Section: Behaviour Of Calcium Carbonate Phasesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Carbonate mineral paragenesis and reaction kinetics in the system MgO–CaO–CO 2 –H 2 O in presence of chloride or nitrate ions at near surface ambient temperatures

Kristová

Hopkinson

Rutt

et al. 2014

Applied Geochemistry

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show abstract

“…Mg 2+ plays a very important role in the formation process of monohydrocalcite. Many researchers have reported that Mg is ubiquitous in the formation of monohydrocalcite in laboratory and natural environments [46,47] and the prerequisite is high content of Mg in the culture medium [48]. It is clear that the difference in mineral morphology is caused by different sources of Mg 2+ duo to the bacteria do not exist and with the same other conditions during the process of biomineralization.…”

Section: Morphology Of Carbonate Mineralsmentioning

confidence: 99%

Biomineralization of Carbonate Minerals Induced by Halophilic <em>Chromohalobacter israelensis</em> in High Salt Concentration: Implications for Natural Environments

Han

Li²,

Zhao

et al. 2017

Preprint

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High salt environment was widespread in modern and geological record, and sedimentation induced by microbes in these systems was an important part of sedimentary minerals and rocks. The mechanism of microbiologically induced carbonate precipitation has not been solved thoroughly although numerous scholars and experts have made specifically research of the problems with respect to minerals induced by bacteria. The study of carbonate minerals induced by Halophilic bacteria has aroused wide concern. The present study was aim to investigate the characterization and process of biomineralization in the high salt system, a Halophilic bacterium, Chromohalobacter israelensis LD532 strain (Genbank: KX766026), which isolated from Yinjiashan Saltern of China, was selected as an object to induce carbonate minerals. Carbonate minerals induced by LD532 were investigated in several comparative experimental sets with Mg resources of magnesium sulfate and magnesium chloride. Magnesium calcite and aragonite were induced by LD532 bacteria while these minerals were not in the control group. The mineral phases, micromorphologies, and crystal structures were analyzed using X-ray powder diffraction, scanning electron microscope, and energy dispersive X-ray detector. Carbonic anhydrase and urease secreted by strain LD532 through metabolism promoted the pH values of the liquid medium and the process of carbonate precipitation. Further study proved that the nucleation sites of partial carbonate nucleus were located on the extracellular polymeric substance and the membrane of intracellular vesicles of LD532 bacteria by high resolution transmission electron microscopy, energy dispersive X-ray detector and ultrathin slices analysis, which provided favorable conditions for the growth of carbonate mineral crystals. The morphology and composition of minerals formed in MgSO4 and MgCl2 solution have significant differences, indicating that different sources of Mg 2+ could also affect the physiological and biochemical activities of microorganisms and then affect the mineral deposition. The accomplished study is of certain interest for interpretation of the carbonates biomineraliazation in natural salt environment, and has a certain reference value in understand of the sedimentary carbonates in ancient marine environment like evaporated tidal flat.

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Microbial EPS‐mediated amorphous calcium carbonate–monohydrocalcite–calcite transformations during early tufa deposition

Broughton

2022

The Depositional Record

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The Holocene Wolfenden tufa deposit in south-eastern British Columbia, western Canada, preserves a unique record of the earliest stages of calcium carbonate deposition resulting from microbial extracellular polymeric substances-mediated precipitation of amorphous calcium carbonate (ACC) with partial transformation to monohydrocalcite (MHC) and subsequently to nanocrystalline calcite. This is the first documentation of tufa mineralogy involving ACC transformation to MHC. Progressive dehydration triggered ACC-MHC-nanocrystalline calcite transformations on bryophytes, algae and cyanobacteria sheaths. The adsorption of extracellular polymeric substances matrix molecules into the ACC and ACC-MHC structures preserved polymorph mineralogy of incomplete transformation.How to cite this article: Broughton, P. L. ( 2023) Microbial EPS-mediated amorphous calcium carbonate-monohydrocalcite-calcite transformations during early tufa deposition.

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Formation condition of monohydrocalcite from CaCl2–MgCl2–Na2CO3 solutions

Cited by 80 publications

References 40 publications

Carbonate mineral paragenesis and reaction kinetics in the system MgO–CaO–CO 2 –H 2 O in presence of chloride or nitrate ions at near surface ambient temperatures

Carbonate mineral paragenesis and reaction kinetics in the system MgO–CaO–CO 2 –H 2 O in presence of chloride or nitrate ions at near surface ambient temperatures

Biomineralization of Carbonate Minerals Induced by Halophilic <em>Chromohalobacter israelensis</em> in High Salt Concentration: Implications for Natural Environments

Microbial EPS‐mediated amorphous calcium carbonate–monohydrocalcite–calcite transformations during early tufa deposition

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