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Journal Article

Mosaic structure in the spines of Holopneustes porossisimus

MPS-Authors
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Rüttgers,  Angelika
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

/persons/resource/persons182739

Irsen,  Stephan
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

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https://www.degruyter.com/document/doi/10.1524/zkri.2012.1541/html
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Citation

Kelm, K., Goetz, A., Rüttgers, A., Irsen, S., Hoffmann, R., Schmahl, W. W., et al. (2012). Mosaic structure in the spines of Holopneustes porossisimus. Zeitschrift für Kristallographie-Crystalline Materials, 227(11), 758-765. doi:10.1524/zkri.2012.1541.


Cite as: https://hdl.handle.net/21.11116/0000-0009-7930-9
Abstract
Sea urchin spines ofHolopneustes porossisi-musare porous single crystals, with the pores being filledwith a material rich in carbon, silicon, fluorine and so-dium. The magnesian calcite constituting the spine ishighly strained. Even though the spines appear to be sin-gle crystalline on a macroscopic scale, the calcitic materialexhibits an extended defect network. We find dislocationsas well as rotational and other, not yet identified bound-aries. We also observe within spine calcite a patterned dis-tribution of sulphur. Both distributions, that of the defectnetwork and that of sulphur resemble in their pattern toeach other and have a similar mesh size of 50 nm. Weconclude from these observations that they arise from thegrowth process of the spine and account for the mosaicitywithin the spine single crystals.