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

Li Kangxin, Liu Xun, Guo Rong, Wu Chao, Peng Bihui, Li Zhaoqian, Duan Xiaohui, Zhou Yong and Pei Chonghua
Non-isodiametric growth and confinement effect in the mineralisation of witherite
Mineralogical Magazine (August 2020) 84 (4): 524-532

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, Ca (super 2+) , a common substitute for Ba (super 2+) , 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 Ca (super 2+) and egg white have relatively independent regulatory effects on the mineralisation of witherite particles. Egg white primarily limits the growth of the nanocrystals, while Ca (super 2+) directs their non-isodiametric growth. Results shows that Ca (super 2+) is distributed along a gradient in nanocrystalline witherite particles, with the Ca (super 2+) 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.


ISSN: 0026-461X
EISSN: 1471-8022
Coden: MNLMBB
Serial Title: Mineralogical Magazine
Serial Volume: 84
Serial Issue: 4
Title: Non-isodiametric growth and confinement effect in the mineralisation of witherite
Affiliation: Southwest University of Science and Technology, State Key Laboratory of Environment-friendly Energy Materials, Mianiyang, China
Pages: 524-532
Published: 202008
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 23
Accession Number: 2020-080760
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: Nanjing University, CHN, China
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2020
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