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Non-isodiametric growth and confinement effect in the mineralisation of witherite

Published online by Cambridge University Press:  01 July 2020

Kangxin Li ,
Xun Liu Open the ORCID record for Xun Liu [Opens in a new window] ,
Rong Guo ,
Chao Wu ,
Bihui Peng ,
Zhaoqian Li ,
Xiaohui Duan ,
Yong Zhou  and
Chonghua Pei
Kangxin Li
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Xun Liu*
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Rong Guo
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Chao Wu
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Bihui Peng
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Zhaoqian Li
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Xiaohui Duan
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
Yong Zhou
Affiliation:
Department of Materials Science and Engineering, National Lab of Solid State Microstructure, ERERC, Nanjing University, Nanjing 210093, China.
Chonghua Pei*
Affiliation:
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
*
*Author for correspondence: Xun Liu, Email: liuxun@swust.edu.cn Chonghua Pei, Email: peichonghua@swust.edu.cn
*Author for correspondence: Xun Liu, Email: liuxun@swust.edu.cn Chonghua Pei, Email: peichonghua@swust.edu.cn
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Abstract

Witherite originates from the biochemical sedimentation of barium in sea water. Due to the complexity of the metallogenic environment, witherite appears in many morphologies. However, the relationship between its diverse morphologies and its mineralisation environment is not well understood. In this paper, Ca2+, a common substitute for Ba2+, and mixed protein (egg white) were used to simulate the inorganic and organic environments of witherite mineralisation, respectively. Comparison of samples prepared under different conditions showed that Ca2+ and egg white have relatively independent regulatory effects on the mineralisation of witherite particles. Egg white primarily limits the growth of the nanocrystals, while Ca2+ directs their non-isodiametric growth. Results shows that Ca2+ is distributed along a gradient in nanocrystalline witherite particles, with the Ca2+ content being proportional to the diameter of the nanocrystals. The results of this study shed light on the different roles of organic matter and inorganic ions in the formation of witherite and offer insight into the genesis of its various morphologies.

Keywords

witheritemineralisationnon-isodiametric growthconfinement effectegg whitecalcium ion
Type
Article
Information
Mineralogical Magazine , Volume 84 , Issue 4 , August 2020 , pp. 524 - 532
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2020

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Footnotes

Associate Editor: Casey Bryce

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