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Title: Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration

Abstract

We have approached the long-standing geochemical question why anhydrous high-Mg carbonate minerals (i.e., magnesite and dolomite) cannot be formed at ambient conditions from a new perspective by exploring the formation of MgCO{sub 3} and Mg{sub x}Ca{sub (1-x)}CO{sub 3} in non-aqueous solutions. Data collected from our experiments in this funding period suggest that a fundamental barrier, other than cation hydration, exists that prevents Mg{sup 2+} and CO{sub 3}{sup 2-} ions from forming long-range ordered structures. We propose that this barrier mainly stems from the lattice limitation on the spatial configuration of CO{sub 3} groups in magnesite crystals. On the other hand, the measured higher distribution coefficients of Mg between magnesian calcites formed in the absence and presence of water give us a first direct proof to support and quantify the cation hydration effect.

Authors:
 [1];  [2]
  1. PI, The George Washington University
  2. Co-PI, University of Wisconsin-Madison
Publication Date:
Research Org.:
George Washington Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1089154
Report Number(s):
Report-13
DOE Contract Number:  
FG02-02ER15366
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Teng, H. Henry, and Xu, Huifang. Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration. United States: N. p., 2013. Web. doi:10.2172/1089154.
Teng, H. Henry, & Xu, Huifang. Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration. United States. https://doi.org/10.2172/1089154
Teng, H. Henry, and Xu, Huifang. 2013. "Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration". United States. https://doi.org/10.2172/1089154. https://www.osti.gov/servlets/purl/1089154.
@article{osti_1089154,
title = {Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration},
author = {Teng, H. Henry and Xu, Huifang},
abstractNote = {We have approached the long-standing geochemical question why anhydrous high-Mg carbonate minerals (i.e., magnesite and dolomite) cannot be formed at ambient conditions from a new perspective by exploring the formation of MgCO{sub 3} and Mg{sub x}Ca{sub (1-x)}CO{sub 3} in non-aqueous solutions. Data collected from our experiments in this funding period suggest that a fundamental barrier, other than cation hydration, exists that prevents Mg{sup 2+} and CO{sub 3}{sup 2-} ions from forming long-range ordered structures. We propose that this barrier mainly stems from the lattice limitation on the spatial configuration of CO{sub 3} groups in magnesite crystals. On the other hand, the measured higher distribution coefficients of Mg between magnesian calcites formed in the absence and presence of water give us a first direct proof to support and quantify the cation hydration effect.},
doi = {10.2172/1089154},
url = {https://www.osti.gov/biblio/1089154}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 17 00:00:00 EDT 2013},
month = {Wed Jul 17 00:00:00 EDT 2013}
}