Composite material in the sea urchin Cidaris rugosa: Ordered and disordered micrometre-scale bicontinuous geometries

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dc.contributor.authorJessop, Anna-Lee
dc.contributor.authorMillsteed, Allan J.
dc.contributor.authorKirkensgaard, Jacob Judas Kain
dc.contributor.authorShaw, Jeremy
dc.contributor.authorClode, Peta L.
dc.contributor.authorSchroeder-Turk, Gerd
dc.date.accessioned2024-09-05T01:25:14Z
dc.date.available2024-09-05T01:25:14Z
dc.date.issued2024
dc.date.updated2024-04-21T08:16:07Z
dc.description.abstractThe sponge-like biomineralized calcite materials found in echinoderm skeletons are of interest in terms of both structure formation and biological function. Despite their crystalline atomic structure, they exhibit curved interfaces that have been related to known triply periodic minimal surfaces. Here, we investigate the endoskeleton of the sea urchin Cidaris rugosa that has long been known to form a microstructure related to the Primitive surface. Using X-ray tomography, we find that the endoskeleton is organized as a composite material consisting of domains of bicontinuous microstructures with different structural properties. We describe, for the first time, the co-occurrence of ordered single Primitive and single Diamond structures and of a disordered structure within a single skeletal plate. We show that these structures can be distinguished by structural properties including solid volume fraction, trabeculae width and, to a lesser extent, interface area and mean curvature. In doing so, we present a robust method that extracts interface areas and curvature integrals from voxelized datasets using the Steiner polynomial for parallel body volumes. We discuss these very large-scale bicontinuous structures in the context of their function, formation and evolution.
dc.description.sponsorshipWe gratefully acknowledge funding by the Australian Research Council (ARC) through the Discovery Project no. DP200102593. A.J.M issupported by an Australian Government Research Training Program (RTP) Scholarship.
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn1742-5689
dc.identifier.urihttps://hdl.handle.net/1885/733716151
dc.language.isoen_AUen_AU
dc.provenancePublished by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the originalauthor and source are credited.
dc.publisherRoyal Society Publishing
dc.relationhttp://purl.org/au-research/grants/arc/DP200102593
dc.rights© 2024 The Authors.
dc.rights.licenseCreative Commons Attribution License
dc.rights.urihttp://creativecommons.org/licenses/by/4.0
dc.sourceJournal of the Royal Society Interface
dc.subjectcalcite
dc.subjectbiomineralization
dc.subjectdiamond
dc.subjectcalciumcarbonate
dc.subjectcurvature
dc.titleComposite material in the sea urchin Cidaris rugosa: Ordered and disordered micrometre-scale bicontinuous geometries
dc.typeJournal article
dcterms.accessRightsOpen Access
local.bibliographicCitation.issue212
local.bibliographicCitation.startpage2023.0597
local.contributor.affiliationJessop, Anna-Lee, Murdoch University
local.contributor.affiliationMillsteed, Allan J., Murdoch University
local.contributor.affiliationKirkensgaard, Jacob Judas Kain, Copenhagen University
local.contributor.affiliationShaw, Jeremy, University of Western Australia
local.contributor.affiliationClode, Peta L., University of Western Australia
local.contributor.affiliationSchroeder-Turk, Gerd, College of Science, ANU
local.contributor.authoremailu5031950@anu.edu.au
local.contributor.authoruidSchroeder-Turk, Gerd, u5031950
local.description.notesImported from ARIES
local.identifier.absfor400302 - Biomaterials
local.identifier.ariespublicationU1147026xPUB76
local.identifier.citationvolume21
local.identifier.doi10.1098/rsif.2023.0597
local.identifier.scopusID2-s2.0-85187707597
local.identifier.uidSubmittedByU1147026
local.type.statusPublished Version
publicationvolume.volumeNumber21

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