Cronstedtite: H2 generation and new constraints on its formation conditions

IF 5.3 2区 地球科学 Q2 CHEMISTRY, PHYSICAL
Isabella Pignatelli , Enrico Mugnaioli , Régine Mosser-Ruck , Mustapha Abdelmoula , Jérôme Sterpenich
{"title":"Cronstedtite: H2 generation and new constraints on its formation conditions","authors":"Isabella Pignatelli ,&nbsp;Enrico Mugnaioli ,&nbsp;Régine Mosser-Ruck ,&nbsp;Mustapha Abdelmoula ,&nbsp;Jérôme Sterpenich","doi":"10.1016/j.clay.2024.107627","DOIUrl":null,"url":null,"abstract":"<div><div>This work investigated the formation conditions of cronstedtite, the most Fe-rich serpentine, using a steel autoclave lined with Teflon at 90 °C, over 167 days, allowing for in situ monitoring of pH, T and P, as well as for gas sampling. From a starting mineralogical mixture composed of quartz and metal iron, cronstedtite crystallized in association with, magnetite, akaganeite, ferrihydrite and amorphous silica. This mineralogical association was not observed in previous syntheses and it is likely related to the experimental conditions of this study. These conditions also affected the composition and structure (polytypic sequence and crystallinity degree) of cronstedtite, which are accurately characterized for the first time. Experimental data and thermodynamic modelling indicate that this Fe-serpentine formed under neutral conditions, -62 &lt; log<em>f</em>O<sub>2</sub> &lt; −59, and redox potential ranging from −0.46 to −0.41 Volts. During the experiment, H<sub>2</sub> was generated by iron oxidation in presence of water, explaining the increase of pressure in the autoclave until 6.8 bar at 90 °C. The total amount of H<sub>2</sub> generated was of 0.23 mol. The results of this study are useful to improve the understanding of cronstedtite formation in natural and anthropic environments. They also showed that formation conditions of cronstedtite seem to be compatible with those needed for hydrogenotrophic life, as previously supposed by other works.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Clay Science","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169131724003752","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

Abstract

This work investigated the formation conditions of cronstedtite, the most Fe-rich serpentine, using a steel autoclave lined with Teflon at 90 °C, over 167 days, allowing for in situ monitoring of pH, T and P, as well as for gas sampling. From a starting mineralogical mixture composed of quartz and metal iron, cronstedtite crystallized in association with, magnetite, akaganeite, ferrihydrite and amorphous silica. This mineralogical association was not observed in previous syntheses and it is likely related to the experimental conditions of this study. These conditions also affected the composition and structure (polytypic sequence and crystallinity degree) of cronstedtite, which are accurately characterized for the first time. Experimental data and thermodynamic modelling indicate that this Fe-serpentine formed under neutral conditions, -62 < logfO2 < −59, and redox potential ranging from −0.46 to −0.41 Volts. During the experiment, H2 was generated by iron oxidation in presence of water, explaining the increase of pressure in the autoclave until 6.8 bar at 90 °C. The total amount of H2 generated was of 0.23 mol. The results of this study are useful to improve the understanding of cronstedtite formation in natural and anthropic environments. They also showed that formation conditions of cronstedtite seem to be compatible with those needed for hydrogenotrophic life, as previously supposed by other works.
克朗斯梯特:H2 生成及其形成条件的新制约因素
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
期刊介绍: Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信