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Cited by 57Calcium Carbonate Crystallization and InhibitionMineralogy and Gemology StudiesGeochemistry and Elemental Analysis

Hydrous calcium magnesium carbonate, a possible precursor to the formation of sedimentary dolomite

Kelleher, Ian J., Redfern, Simon A.T.·2002·Molecular Simulation
DOI 10.1080/08927020290030134
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Abstract

Material of composition Ca1.056 Mg0.944 (SO4)0.035 (CO3)1.965 ⋅0.26H2O has been synthesised from solutions of Ca(NO3)2, MgSO4 and Na2CO3. X-ray diffraction and infrared spectroscopy show this to be identical to "protodolomite" found in nature, and that the structure is related to dolomite but is hydrous, retaining water to beyond 200°C on heating. This hydrous magnesium calcium carbonate grows as spherules, with a distinct core-rim structure apparent in optical microscopy. It seems likely that in low-temperature environments (around 80°C) a dolomite crystal grows in nature via this or a similar hydrous intermediate phase, which may hold the solution to the "dolomite problem".

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26 of 26 references verified0 citation errors · 0 not checkable

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  • The amorphous Ca-Mg carbonate precursor precipitated from highly supersaturated solutions and transformed to dolomite via proto-dolomite at moderate to high temperatures (e.g., 40-200 °C).

    “This precursor precipitated from highly supersaturated solutions, and transformed to dolomite via proto-dolomite at moderate to high temperatures (e.g., 40-200 ° C; Kelleher and Redfern 2002; Schmidt et al. 2005).”

    From A route for the direct crystallization of dolomite (2015) · cites this paper as Kelleher and Redfern 2002

  • Protodolomites are usually distinguished from crystalline dolomite by the lack of superstructure peaks in the powder diffraction pattern.

    “Such protodolomites are usually distinguished from crystalline dolomite by the lack of superstructure peaks in the powder diffraction pattern (Kelleher and Redfern 2002).”

    From A route for the direct crystallization of dolomite (2015) · cites this paper as Kelleher and Redfern 2002

  • Only a few experimental studies have attempted to quantify the fundamental reactions controlling the formation of inorganic dolomite directly from solution.

    “Only a few experimental studies have attempted to quantify the fundamental reactions controlling the formation of inorganic dolomite 'directly' from solution (Ohde and Kitano 1978; Kelleher and Redfern 2002; Schmidt et al. 2005).”

    From A route for the direct crystallization of dolomite (2015) · cites this paper as Kelleher and Redfern 2002

  • Both studies show a proto-dolomite to dolomite transition driven by a surface dissolution and reprecipitation mechanism.

    “Nevertheless, both studies show a proto-dolomite to dolomite transition, which is driven by a surface dissolution and reprecipitation mechanism as also suggested by Kelleher and Redfern (2002).”

    From A route for the direct crystallization of dolomite (2015) · cites this paper as Kelleher and Redfern 2002

  • The transformation of high-Mg calcite or very high-Mg calcite to dolomite can be qualitatively described by Ostwald's step rule.

    “it has been suggested that the transformation of high-Mg calcite or very high-Mg calcite to dolomite can be qualitatively described by Ostwald's step rule [126,138,141-143,145,146].”

    From Thermodynamic and Kinetic Studies of Dolomite Formation: A Review (2023) · cites this paper as [146]

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Authors
Kelleher, I. J., & Redfern, S. A. T.
Affiliations
University of Cambridge (GB)
ORCID
Redfern, Simon A.T.
Venue
Molecular Simulation
Publisher
Informa UK Limited
Published
2002-06
Volume
28
Issue
6-7
Pages
557-572
ISSN
  • 0892-7022 (ISSN-L)
  • 1029-0435
DOI
10.1080/08927020290030134
OpenAlex
W2053022786
Cited by
57
References
26
Citations by year
2026: 2 · 2025: 7 · 2024: 5 · 2023: 3 · 2022: 1 · 2021: 6 · 2019: 3 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 1 · 2013: 3 · 2012: 3
FWCI
0.86
Type
journal article
Language
en
Open access
closed
Locations
Molecular Simulation (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Biomaterials › Calcium Carbonate Crystallization and Inhibition
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Mineralogy and Gemology Studies
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
protodolomite, dolomite formation, dolomite problem, dolomite precipitation, crystal growth, core-rim structure, spherules

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