Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate
Identifieur interne : 002481 ( Istex/Corpus ); précédent : 002480; suivant : 002482Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate
Auteurs : Alejandro Fernandez-Martinez ; Bora Kalkan ; Simon M. Clark ; Glenn A. WaychunasSource :
- Angewandte Chemie International Edition [ 1433-7851 ] ; 2013-08-05.
English descriptors
- KwdEn :
- Ambient, Ambient pressure, Angew, Angewandte communications, Aragonite, Basic energy sciences, Bulk modulus, Calcite, Calcium carbonate, Carbonate, Chem, Crystalline phases, Crystalline polymorphs, Cyclotron road, Decompression, Different distances, Good agreement, Good example, High pressures, Higher wavenumbers, Lawrence berkeley, Light source, Local order, Lower molar volume, Main diffraction peak, Molar, Molar volume, Molar volume data, Phys, Polyamorphism, Raman data, Theoretical value, Verlag gmbh, Weinheim angew.
- Teeft :
- Ambient, Ambient pressure, Angew, Angewandte communications, Aragonite, Basic energy sciences, Bulk modulus, Calcite, Calcium carbonate, Carbonate, Chem, Crystalline phases, Crystalline polymorphs, Cyclotron road, Decompression, Different distances, Good agreement, Good example, High pressures, Higher wavenumbers, Lawrence berkeley, Light source, Local order, Lower molar volume, Main diffraction peak, Molar, Molar volume, Molar volume data, Phys, Polyamorphism, Raman data, Theoretical value, Verlag gmbh, Weinheim angew.
Abstract
Pressed for time: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous–amorphous phase transition at 10 GPa, adopting an aragonite‐like local order. This result suggests a mechanism by which Mg2+—a cation with smaller ionic radius than Ca2+—modifies the local order of ACC to an aragonite‐like order by helping to decrease the molar volume of the amorphous phase.
Url:
DOI: 10.1002/anie.201302974
Links to Exploration step
ISTEX:C67DCD7065C6CFBECD8DCCFC44719AD3A0007D51Le document en format XML
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This result suggests a mechanism by which Mg2+—a cation with smaller ionic radius than Ca2+—modifies the local order of ACC to an aragonite‐like order by helping to decrease the molar volume of the amorphous phase.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>aragonite</json:string><json:string>chem</json:string><json:string>ambient</json:string><json:string>carbonate</json:string><json:string>angew</json:string><json:string>polyamorphism</json:string><json:string>phys</json:string><json:string>calcite</json:string><json:string>ambient pressure</json:string><json:string>molar</json:string><json:string>molar volume</json:string><json:string>local order</json:string><json:string>verlag gmbh</json:string><json:string>high pressures</json:string><json:string>decompression</json:string><json:string>crystalline phases</json:string><json:string>raman data</json:string><json:string>light source</json:string><json:string>cyclotron road</json:string><json:string>higher wavenumbers</json:string><json:string>basic energy sciences</json:string><json:string>lawrence berkeley</json:string><json:string>theoretical value</json:string><json:string>weinheim angew</json:string><json:string>calcium carbonate</json:string><json:string>bulk modulus</json:string><json:string>different distances</json:string><json:string>crystalline polymorphs</json:string><json:string>good agreement</json:string><json:string>main diffraction peak</json:string><json:string>good example</json:string><json:string>molar volume data</json:string><json:string>lower molar volume</json:string><json:string>angewandte communications</json:string></teeft></keywords><author><json:item><name>Dr. Alejandro Fernandez‐Martinez</name><affiliations><json:string>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) http://isterre.fr/alex‐fernandez‐martinez</json:string><json:string>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</json:string><json:string>E-mail: Alex.Fernandez‐Martinez@ujf‐grenoble.fr</json:string><json:string>Correspondence address: Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France)</json:string></affiliations></json:item><json:item><name>Dr. Bora Kalkan</name><affiliations><json:string>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</json:string></affiliations></json:item><json:item><name>Dr. Simon M. Clark</name><affiliations><json:string>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</json:string><json:string>Department of Earth and Planetary Sciences, Macquarie University, 2109 NSW (Australia)</json:string></affiliations></json:item><json:item><name>Dr. Glenn A. 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KGaA, Weinheim</licence></availability><date type="published" when="2013-08-05"></date></publicationStmt><notesStmt><note type="content-type" subtype="brief-communication" source="shortCommunication" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-S9SX2MFS-0">brief-communication</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="brief-communication"><analytic><title level="a" type="main" xml:lang="en">Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate<ref type="note" target="#nss"></ref></title><author xml:id="author-0000" role="corresp"><persName><addName>Dr.</addName><forename type="first">Alejandro</forename><surname>Fernandez‐Martinez</surname></persName><email>Alex.Fernandez‐Martinez@ujf‐grenoble.fr</email><affiliation>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) <address><country key="FR"></country></address></affiliation><affiliation>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)<address><country key="US"></country></address></affiliation><affiliation>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) http://isterre.fr/alex‐fernandez‐martinez</affiliation></author><author xml:id="author-0001"><persName><addName>Dr.</addName><forename type="first">Bora</forename><surname>Kalkan</surname></persName><affiliation>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)<address><country key="US"></country></address></affiliation></author><author xml:id="author-0002"><persName><addName>Dr.</addName><forename type="first">Simon M.</forename><surname>Clark</surname></persName><affiliation>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)<address><country key="US"></country></address></affiliation><affiliation>Department of Earth and Planetary Sciences, Macquarie University, 2109 NSW (Australia)<address><country key="AU"></country></address></affiliation></author><author xml:id="author-0003"><persName><addName>Dr.</addName><forename type="first">Glenn A.</forename><surname>Waychunas</surname></persName><affiliation>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)<address><country key="US"></country></address></affiliation></author><idno type="istex">C67DCD7065C6CFBECD8DCCFC44719AD3A0007D51</idno><idno type="ark">ark:/67375/WNG-B5686JJD-2</idno><idno type="DOI">10.1002/anie.201302974</idno><idno type="unit">ANIE201302974</idno><idno type="toTypesetVersion">file:ANIE.ANIE201302974.pdf</idno></analytic><monogr><title level="j" type="main">Angewandte Chemie International Edition</title><title level="j" type="alt">ANGEWANDTE CHEMIE INTERNATIONAL EDITION</title><idno type="pISSN">1433-7851</idno><idno type="eISSN">1521-3773</idno><idno type="book-DOI">10.1002/(ISSN)1521-3773</idno><idno type="book-part-DOI">10.1002/anie.v52.32</idno><idno type="product">ANIE</idno><imprint><biblScope unit="vol">52</biblScope><biblScope unit="issue">32</biblScope><biblScope unit="page" from="8354">8354</biblScope><biblScope unit="page" to="8357">8357</biblScope><biblScope unit="page-count">4</biblScope><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2013-08-05"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="graphical"><p><hi rend="bold">Pressed for time</hi>: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous–amorphous phase transition at 10 GPa, adopting an aragonite‐like local order. This result suggests a mechanism by which Mg<hi rend="superscript">2+</hi>—a cation with smaller ionic radius than Ca<hi rend="superscript">2+</hi>—modifies the local order of ACC to an aragonite‐like order by helping to decrease the molar volume of the amorphous phase.<figure type="box"><media mimeType="image" url="urn:x-wiley:14337851:media:ANIE201302974:content"></media></figure></p></abstract><textClass><keywords xml:lang="en"><term xml:id="kwd1">amorphous materials</term><term xml:id="kwd2">calcium carbonate</term><term xml:id="kwd3">phase transitions</term><term xml:id="kwd4">Raman spectroscopy</term><term xml:id="kwd5">X‐ray diffraction</term></keywords><keywords rend="articleCategory"><term>Communication</term></keywords><keywords rend="tocHeading1"><term>Communications</term></keywords><keywords rend="tocHeading2"><term>Polyamorphism</term></keywords></textClass><langUsage><language ident="en"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/C67DCD7065C6CFBECD8DCCFC44719AD3A0007D51/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>WILEY‐VCH Verlag</publisherName><publisherLoc>Weinheim</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1521-3773</doi><issn type="print">1433-7851</issn><issn type="electronic">1521-3773</issn><idGroup><id type="product" value="ANIE"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="ANGEWANDTE CHEMIE INTERNATIONAL EDITION">Angewandte Chemie International Edition</title><title type="short">Angew. Chem. Int. Ed.</title></titleGroup></publicationMeta><publicationMeta level="part" position="320"><doi origin="wiley" registered="yes">10.1002/anie.v52.32</doi><numberingGroup><numbering type="journalVolume" number="52">52</numbering><numbering type="journalIssue">32</numbering></numberingGroup><coverDate startDate="2013-08-05">August 5, 2013</coverDate></publicationMeta><publicationMeta level="unit" type="shortCommunication" position="35" status="forIssue"><doi origin="wiley" registered="yes">10.1002/anie.201302974</doi><idGroup><id type="unit" value="ANIE201302974"></id></idGroup><countGroup><count type="pageTotal" number="4"></count></countGroup><titleGroup><title type="articleCategory">Communication</title><title type="tocHeading1">Communications</title><title type="tocHeading2">Polyamorphism</title></titleGroup><copyright ownership="publisher">Copyright © 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</copyright><eventGroup><event type="manuscriptReceived" date="2013-04-10"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:3.2.3 mode:FullText" date="2013-08-02"></event><event type="publishedOnlineEarlyUnpaginated" date="2013-07-01"></event><event type="firstOnline" date="2013-07-01"></event><event type="publishedOnlineFinalForm" date="2013-08-02"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-03"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.6.4 mode:FullText" date="2015-10-03"></event></eventGroup><numberingGroup><numbering type="pageFirst">8354</numbering><numbering type="pageLast">8357</numbering></numberingGroup><correspondenceTo>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) <url href="http://isterre.fr/alex-fernandez-martinez">http://isterre.fr/alex‐fernandez‐martinez</url></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:ANIE.ANIE201302974.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="4"></count><count type="tableTotal" number="0"></count><count type="referenceTotal" number="36"></count></countGroup><titleGroup><title type="main" xml:lang="en">Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate<link href="#nss"></link></title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#aa #ad" corresponding="yes"><personName><honorifics>Dr.</honorifics><givenNames>Alejandro</givenNames><familyName>Fernandez‐Martinez</familyName></personName><contactDetails><email normalForm="Alex.Fernandez-Martinez@ujf-grenoble.fr">Alex.Fernandez‐Martinez@ujf‐grenoble.fr</email></contactDetails></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#ab"><personName><honorifics>Dr.</honorifics><givenNames>Bora</givenNames><familyName>Kalkan</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#ab #ac"><personName><honorifics>Dr.</honorifics><givenNames>Simon M.</givenNames><familyName>Clark</familyName></personName></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#ad"><personName><honorifics>Dr.</honorifics><givenNames>Glenn A.</givenNames><familyName>Waychunas</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="aa" countryCode="FR" type="organization"><unparsedAffiliation>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) <url href="http://isterre.fr/alex-fernandez-martinez">http://isterre.fr/alex‐fernandez‐martinez</url></unparsedAffiliation></affiliation><affiliation xml:id="ab" countryCode="US" type="organization"><unparsedAffiliation>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</unparsedAffiliation></affiliation><affiliation xml:id="ac" countryCode="AU" type="organization"><unparsedAffiliation>Department of Earth and Planetary Sciences, Macquarie University, 2109 NSW (Australia)</unparsedAffiliation></affiliation><affiliation xml:id="ad" countryCode="US" type="organization"><unparsedAffiliation>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">amorphous materials</keyword><keyword xml:id="kwd2">calcium carbonate</keyword><keyword xml:id="kwd3">phase transitions</keyword><keyword xml:id="kwd4">Raman spectroscopy</keyword><keyword xml:id="kwd5">X‐ray diffraction</keyword></keywordGroup><fundingInfo><fundingAgency>Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy</fundingAgency><fundingNumber>DE‐AC02‐05CH11231</fundingNumber></fundingInfo><fundingInfo><fundingAgency>Office of Science of the U.S. Department of Energy</fundingAgency><fundingNumber>DE‐AC02‐05CH11231</fundingNumber></fundingInfo><fundingInfo><fundingAgency>U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences</fundingAgency><fundingNumber>DE‐AC02‐05CH11231</fundingNumber></fundingInfo><fundingInfo><fundingAgency>IAEA</fundingAgency><fundingNumber>TUR/10006</fundingNumber></fundingInfo><supportingInformation><p>As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
</p><supportingInfoItem><mediaResource alt="supporting information" href="urn-x:wiley:14337851:media:anie201302974:anie_201302974_sm_miscellaneous_information"></mediaResource><caption>miscellaneous_information</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="graphical" xml:lang="en"><p><b>Pressed for time</b>: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous–amorphous phase transition at 10 GPa, adopting an aragonite‐like local order. This result suggests a mechanism by which Mg<sup>2+</sup>—a cation with smaller ionic radius than Ca<sup>2+</sup>—modifies the local order of ACC to an aragonite‐like order by helping to decrease the molar volume of the amorphous phase.<blockFixed type="graphic"><mediaResourceGroup><mediaResource alt="image" eRights="yes" copyright="WILEY-VCH" href="urn:x-wiley:14337851:media:ANIE201302974:content"></mediaResource></mediaResourceGroup></blockFixed></p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="nss"><p>The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. A.F.‐M. and G.A.W. were partially supported as part of the Center for Nanoscale Control of Geologic CO<sub>2</sub>, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE‐AC02‐05CH11231. B.K. acknowledges support from IAEA,fellowship Code No.: TUR/10006. We thank Adam F. Wallace for fruitful discussions.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Pressure‐Induced Polyamorphism and Formation of ‘Aragonitic’ Amorphous Calcium Carbonate</title></titleInfo><name type="personal"><namePart type="termsOfAddress">Dr.</namePart><namePart type="given">Alejandro</namePart><namePart type="family">Fernandez‐Martinez</namePart><affiliation>Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France) http://isterre.fr/alex‐fernandez‐martinez</affiliation><affiliation>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</affiliation><affiliation>E-mail: Alex.Fernandez‐Martinez@ujf‐grenoble.fr</affiliation><affiliation>Correspondence address: Institut des Sciences de la Terre, CNRS & Universite Joseph‐Fourier Grenoble I, B.P. 53X, 38041 Grenoble Cedex 9 (France)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="termsOfAddress">Dr.</namePart><namePart type="given">Bora</namePart><namePart type="family">Kalkan</namePart><affiliation>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="termsOfAddress">Dr.</namePart><namePart type="given">Simon M.</namePart><namePart type="family">Clark</namePart><affiliation>Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</affiliation><affiliation>Department of Earth and Planetary Sciences, Macquarie University, 2109 NSW (Australia)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="termsOfAddress">Dr.</namePart><namePart type="given">Glenn A.</namePart><namePart type="family">Waychunas</namePart><affiliation>Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="brief-communication" displayLabel="shortCommunication" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-S9SX2MFS-0">brief-communication</genre><originInfo><publisher>WILEY‐VCH Verlag</publisher><place><placeTerm type="text">Weinheim</placeTerm></place><dateIssued encoding="w3cdtf">2013-08-05</dateIssued><dateCaptured encoding="w3cdtf">2013-04-10</dateCaptured><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><extent unit="figures">4</extent><extent unit="tables">0</extent><extent unit="references">36</extent></physicalDescription><abstract>Pressed for time: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous–amorphous phase transition at 10 GPa, adopting an aragonite‐like local order. This result suggests a mechanism by which Mg2+—a cation with smaller ionic radius than Ca2+—modifies the local order of ACC to an aragonite‐like order by helping to decrease the molar volume of the amorphous phase.</abstract><note type="content">*The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231. A.F.‐M. and G.A.W. were partially supported as part of the Center for Nanoscale Control of Geologic CO2, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE‐AC02‐05CH11231. B.K. acknowledges support from IAEA,fellowship Code No.: TUR/10006. We thank Adam F. Wallace for fruitful discussions.</note><note type="funding">Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy - No. DE‐AC02‐05CH11231; </note><note type="funding">Office of Science of the U.S. Department of Energy - No. DE‐AC02‐05CH11231; </note><note type="funding">U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences - No. DE‐AC02‐05CH11231; </note><note type="funding">IAEA - No. TUR/10006; </note><subject lang="en"><genre>keywords</genre><topic>amorphous materials</topic><topic>calcium carbonate</topic><topic>phase transitions</topic><topic>Raman spectroscopy</topic><topic>X‐ray diffraction</topic></subject><relatedItem type="host"><titleInfo><title>Angewandte Chemie International Edition</title></titleInfo><titleInfo type="abbreviated"><title>Angew. Chem. Int. 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