Reversed Crystal Growth of Calcite in Naturally Occurring Travertine Crust
AbstractA microstructural investigation by electron microscopy on a travertine specimen collected from Munigou National Park, Sichuan Province, China revealed evidence of a non-classical reversed crystal growth route previously only discovered in synthetic materials. Examination of the travertine specimen suggests that the presence of organic matter initiates the oriented aggregation of calcite nanocrystallites. Surface re-crystallisation of the aggregates leads to a single crystalline rhombohedral shell with a polycrystalline core. This core-shell structure carries a strong resemblance to synthetic calcite prepared in the presence of chitosan, where the growth of calcite was found to follow the so-called reversed crystal growth process. It is proposed that the similar roles of biomolecules in naturally occurring travertine and chitosan in the synthetic system are based on their isoelectric points and the polymerizable property of long chain chemical structures. This study is important so that the structural similarities between naturally occurring biominerals and biomimetic materials can be further understood. View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 1123 KB)
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Greer, H.F.; Zhou, W.; Guo, L. Reversed Crystal Growth of Calcite in Naturally Occurring Travertine Crust. Crystals 2017, 7, 36.
Greer HF, Zhou W, Guo L. Reversed Crystal Growth of Calcite in Naturally Occurring Travertine Crust. Crystals. 2017; 7(2):36.Chicago/Turabian Style
Greer, Heather F.; Zhou, Wuzong; Guo, Li. 2017. "Reversed Crystal Growth of Calcite in Naturally Occurring Travertine Crust." Crystals 7, no. 2: 36.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.