Publication:
Epitactic growth of celestite on anhydrite: substrate induced twinning and morphological evolution of aggregates

dc.contributor.authorForjanes, Pablo
dc.contributor.authorGómez Barreiro, Juan
dc.contributor.authorMorales, Juan
dc.contributor.authorAstilleros García-Monge, José Manuel
dc.contributor.authorFernández Díaz, Lurdes
dc.date.accessioned2023-06-16T15:24:14Z
dc.date.available2023-06-16T15:24:14Z
dc.date.issued2020
dc.description.abstractEpitactic crystal growth plays a main role in the development of mineral processes and in the synthesis of advanced materials. Celestite (SrSO4) forms epitactic overgrowths on anhydrite (CaSO4) (100), (010) and (001) surfaces upon interacting with Sr-bearing aqueous solutions. Two populations of differently oriented celestite crystals related by symmetry operators of substrate are identified on (001)Anh and (100)Anh anhydrite substrates by SEM observations and synchrotron X-ray diffraction analysis. Substrate-induced twins arise after the coalescence of individuals belonging to these populations. Progressing growth results in a marked morphological evolution of epitactic celestite, whose crystals undergo sustained branching and loss of co-orientation that result in the formation of sheaf-like aggregates, on (100)Anh, and swan-like aggregates, on (001)Anh. We relate this evolution to celestite growth in a Ca-rich environment due to continued anhydrite dissolution and incorporation of small amounts of Ca into celestite structure. This incorporation would induce lattice strain which would be released through the formation of dislocations. The regular arrangement of these dislocations in small-angle boundaries would result in progressive splitting, driving the evolution from celestite single crystals to aggregates. Sharp compositional gradients in the boundary layer could explain the anisotropic development that leads to the formation of the swan-like celestites.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipEuropean Synchrotron Radiation Facility
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/62298
dc.identifier.doi10.1039/d0ce00755b
dc.identifier.issn1466-8033
dc.identifier.officialurlhttps://doi.org/10.1039/D0CE00755B
dc.identifier.relatedurlhttps://pubs.rsc.org/en/content/articlelanding/2020/CE/D0CE00755B#!divAbstract
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6587
dc.journal.titleCrystEngComm
dc.language.isoeng
dc.page.final5759
dc.page.initial5743
dc.publisherRoyal Society of Chemistry
dc.relation.projectIDCGL2016-77138-C2-1-P; CGL2016-78560-P
dc.relation.projectIDFPU17/01689; IEDI-2016-00691
dc.relation.projectIDExperiment number ES-698
dc.rights.accessRightsrestricted access
dc.subject.cdu548.2
dc.subject.keywordCrystal growth
dc.subject.keywordCelestite
dc.subject.keywordAnhydrite
dc.subject.ucmCristalografía (Geología)
dc.titleEpitactic growth of celestite on anhydrite: substrate induced twinning and morphological evolution of aggregates
dc.typejournal article
dc.volume.number22
dspace.entity.typePublication
relation.isAuthorOfPublicationa1923245-aea2-4606-b726-d329291980fc
relation.isAuthorOfPublication04510d2c-6771-46a3-a807-f37e2932fb09
relation.isAuthorOfPublication.latestForDiscoverya1923245-aea2-4606-b726-d329291980fc
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