Synchrotron-based crystal structure, associated morphology of snail and bivalve shells by X-ray diffraction
| dc.contributor.author | schiavon, nicola | |
| dc.contributor.author | brunetti, antonio | |
| dc.contributor.author | rao, venkateswara | |
| dc.date.accessioned | 2017-05-05T10:47:06Z | |
| dc.date.available | 2017-05-05T10:47:06Z | |
| dc.date.issued | 2016 | |
| dc.description.abstract | Synchrotron-basedhigh-resolutionX-raypowderdiffractionspectrafromthebodypartsofasnailand bivalve(CaCO3), havebeenrecordedwithPilatusareadetector.ExperimentswereperformedatDesy, Hamburg, Germany,utilizingtheResonantandDiffractionbeamline(P9),with15keVX-rays (λ¼0.82666Å).Theexternalshelloftheselivingorganisms,iscomposedofcalciumcarbonate,which carries strongbiologicalsignal.Itconsistsofsomelightelements,suchas,Ca,CandO,whichconstitute part ofthesofttissueandothertraceelements.Theknowledgeofthesediffractionpatternsandhence the understandingofstructuresatmolecularlevelareenormous.Theapplicationofsynchrotronra- diation topowderdiffractioniswellsuitedforsamplesofbiologicalnatureviachangesintheirpatterns and alsotoinvestigatecrystallographicphasecomposition.WiththeuseofRietveldrefinement proce- dure, tothehigh-resolutiondiffractionspectra,wewereabletoextractthelatticeparametersofor- thorhombic polymorphofCaCO3, themostabundantmineralproducedbytheselivingorganisms.The small sizeofthecrystalliteisaveryimportantfactorrelatedtothebiologicalstructure.Thenatural model presentsacombinationoforganicandinorganicphaseswithnanometersize.Forthepresent study,wealsousedthescanningelectronmicroscopy(SEM)toexploretheassociatedmorphologyofthe snail andbivalve. | por |
| dc.identifier.authoremail | schiavon@uevora.pt | |
| dc.identifier.authoremail | brunetti@uniss.it | |
| dc.identifier.authoremail | dvrao@rgukt.in | |
| dc.identifier.citation | Radiation Physics and Chemistry 127, 155-164 | por |
| dc.identifier.doi | 10.1016/j.radphyschem.2016.06.024 | por |
| dc.identifier.scientificarea | 245 | por |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.radphyschem.2016.06.024 | |
| dc.identifier.uri | http://hdl.handle.net/10174/20975 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier B.V. | por |
| dc.rights | openAccess | por |
| dc.subject | Synchrotron Diffraction | por |
| dc.subject | Calcium carbonate | por |
| dc.subject | shells | por |
| dc.title | Synchrotron-based crystal structure, associated morphology of snail and bivalve shells by X-ray diffraction | por |
| dc.type | article | por |