Homoepitaxial meso- and microscale crystal co-orientation and organic matrix network structure in Mytilus edulis nacre and calcite

Griesshaber, Erika; Schmahl, Wolfgang W.; Ubhi, H. S.; Huber, Julia; Nindiyasari, Fitriana; Maier, Bernd; Ziegler, Andreas

doi:10.1016/j.actbio.2013.07.020

Cited by 63 publications

(63 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…; Griesshaber et al . ) and between aragonite prisms and the inner nacreous layer of freshwater molluscs has been investigated by EBSD in Anodonta anatina and A. cygnea (Freer et al . ).…”

Section: Molluscs – Where Two Polymorphs Meetmentioning

confidence: 99%

Biomineral electron backscatter diffraction for palaeontology

Cusack

2015

Palaeontology

View full text Add to dashboard Cite

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.

show abstract

“…; Griesshaber et al . ) and between aragonite prisms and the inner nacreous layer of freshwater molluscs has been investigated by EBSD in Anodonta anatina and A. cygnea (Freer et al . ).…”

Section: Molluscs – Where Two Polymorphs Meetmentioning

confidence: 99%

Biomineral electron backscatter diffraction for palaeontology

Cusack

2015

Palaeontology

View full text Add to dashboard Cite

show abstract

“…Arrays of basic mineral units form different hard tissue layers, and a combination of the latter comprises the macroscopic shell or the carbonate tooth (Dunlop and Fratzl 2010, Schmahl et al 2012, Goetz et al 2014. Basic mineral units of invertebrate carbonate hard tissues are mesoscopically structured crystals (C€ olfen and Antonietti 2008), as they consist of nano-sized subunits, in general, with a coherent crystallographic coorientation and with subunit organization being mediated by interstitial organic fibrils (Vielzeuf et al 2010, Griesshaber et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Formation and mosaicity of coccolith segment calcite of the marine algae Emiliania huxleyi

Yin

Ziegler

Kelm

et al. 2017

Journal of Phycology

Self Cite

View full text Add to dashboard Cite

Coccolithophores belong to the most abundant calcium carbonate mineralizing organisms. Coccolithophore biomineralization is a complex and highly regulated process, resulting in a product that strongly differs in its intricate morphology from the abiogenically produced mineral equivalent. Moreover, unlike extracellularly formed biological carbonate hard tissues, coccolith calcite is neither a hybrid composite, nor is it distinguished by a hierarchical microstructure. This is remarkable as the key to optimizing crystalline biomaterials for mechanical strength and toughness lies in the composite nature of the biological hard tissue and the utilization of specific microstructures.To obtain insight into the pathway of biomineralization of Emiliania huxleyi coccoliths, we examine intracrystalline nanostructural features of the coccolith calcite in combination with cell ultrastructural observations related to the formation of the calcite in the coccolith vesicle within the cell. With TEM diffraction and annular dark-field 1

show abstract

“…Even though the latter grow together at their perimeters ( Fig. 7) a multitude of nanopores develop within them due to decomposition of biopolymer fibrils, which were present in the pristine hard tissue (e.g., Griesshaber et al, 2013;Casella et al, 2018aCasella et al, , 2018b. In contrast, as Fig.…”

Section: The Dynamic Evolution Of Hydrothermal Alterationmentioning

confidence: 99%

“…A grain is defined as a region completely surrounded by boundaries across by which the misorientation angle relative to the neighbouring grains is larger than a critical value; the critical misorientation value. Griesshaber et al (2013) determined empirically that a critical misorientation value of 2 ° best suits the microstructure of modern carbonate biological hard tissue.…”

Section: Grain Area Evaluationmentioning

confidence: 99%

Assessment of hydrothermal alteration on micro- and nanostructures of biocarbonates: quantitative statistical grain-area analysis of diagenetic overprint

Casella

Griesshaber

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. The assessment of diagenetic overprint on microstructural and geochemical data gained from fossil archives is of fundamental importance for understanding palaeoenvironments. A correct reconstruction of past environmental dynamics is only possible when pristine skeletons are unequivocally distinguished from altered skeletal elements. Our previous studies (Casella et al., 2017) have shown that replacement of biogenic carbonate by inorganic calcite occurs via an interface coupled dissolution&#8211;reprecipitation mechanism. Furthermore, for a comprehensive assessment of alteration, structural changes have to be assessed on the nanoscale as well, which documents the replacement of pristine nanoparticulate calcite by diagenetic nanorhombohedral calcite (Casella et al., 2018a, b). In the present contribution we investigated six different modern biogenic carbonate microstructures for their behaviour under hydrothermal alteration in order to assess their potential to withstand diagenetic overprint and to test the integrity of their preservation in the fossil record. For each microstructure (a) the evolution of biogenic aragonite and calcite replacement by inorganic calcite was examined, (b) distinct carbonate mineral formation steps on the micrometre scale were highlighted, (c) microstructural changes at different stages of alteration were explored, and (d) statistical analysis of differences in basic mineral unit dimensions in pristine and altered skeletons was performed. The latter analysis enables an unequivocal determination of the degree of diagenetic overprint and discloses information especially about low degrees of hydrothermal alteration.

show abstract

Homoepitaxial meso- and microscale crystal co-orientation and organic matrix network structure in Mytilus edulis nacre and calcite

Cited by 63 publications

References 53 publications

Biomineral electron backscatter diffraction for palaeontology

Biomineral electron backscatter diffraction for palaeontology

Formation and mosaicity of coccolith segment calcite of the marine algae Emiliania huxleyi

Assessment of hydrothermal alteration on micro- and nanostructures of biocarbonates: quantitative statistical grain-area analysis of diagenetic overprint

Contact Info

Product

Resources

About