Crystallographic Orientation of Cuttlebone Shield Determined by Electron Backscatter Diffraction

Cusack, Maggie; Chung, Peter

doi:10.1007/s11837-013-0804-z

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…) as well as other cephalopod biomineral structures such as the paper nautilus, Argonauta nodosa , shell (Wolfe et al . ) and the cuttlebone (Cusack and Chung ).…”

Section: Molluscs – Where Two Polymorphs Meetmentioning

confidence: 99%

Biomineral electron backscatter diffraction for palaeontology

Cusack

2015

Palaeontology

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Electron backscatter diffraction (EBSD) originated in materials science and has transferred to biomineral research providing insight into fossil and modern biominerals. An electron microscopy technique, EBSD requires a fine polished sample surface where the electron beam diffracts in the first few lattice layers, identifying mineral, polymorph and crystallographic orientation. The technique is particularly well suited for the analysis of modern and fossil calcium carbonate biominerals, where it provides key insight into biological control of mineral formation such as in molluscs and brachiopods. EBSD readily identifies original and secondary mineralogy, which helps to inform our understanding of biomineral evolution such as the identification of original aragonite in Silurian trimerellid brachiopods. As a technique to identify and thus avoid the inclusion of secondary minerals in proxy organisms such as corals, EBSD can be used to ensure accuracy of palaeoproxy data. Even when fossil systems have no modern equivalents, EBSD can provide key data to determine functional mechanisms such as in the lenses of schizochroal eyes of phacopine trilobites. These few examples illustrate that EBSD is proving to be a valuable component of the palaeontology toolkit.

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“…) as well as other cephalopod biomineral structures such as the paper nautilus, Argonauta nodosa , shell (Wolfe et al . ) and the cuttlebone (Cusack and Chung ).…”

Section: Molluscs – Where Two Polymorphs Meetmentioning

confidence: 99%

Biomineral electron backscatter diffraction for palaeontology

Cusack

2015

Palaeontology

Self Cite

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show abstract

“…For all other samples, both focussed ion beam (FIB) and broad ion beam (BIB) milling techniques were applied to remove any remaining topography and surface damage from manual polishing, before carbon coating. The recommended coating thickness of 2.5 nm [140,222] was not reducing charging effects, therefore various coating thicknesses were tested.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

“…Samples of cuttlebone were either embedded in epoxy resin or left unmounted. Samples were ground and polished (as per the process described in section 3.4.2 and in[222]) to a 0.03 µm finish, with colloidal silica and then cleaned. Observational checks were made to see if the sample surface was free of topography.…”

mentioning

confidence: 99%