A calcite --> aragonite-type phase transition in CdCO ₃

Other| June 01, 1997 A calcite → aragonite-type phase transition in CdCO3 Lin-gun Liu; Lin-gun Liu Academia Sinica, Institute of Earth Sciences, Taipei, Taiwan Search for other works by this author on: GSW Google Scholar Chung-Cherng Lin Chung-Cherng Lin Search for other works by this author on: GSW Google Scholar American Mineralogist (1997) 82 (5-6): 643–646. https://doi.org/10.2138/am-1997-5-625 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Lin-gun Liu, Chung-Cherng Lin; A calcite → aragonite-type phase transition in CdCO3. American Mineralogist 1997;; 82 (5-6): 643–646. doi: https://doi.org/10.2138/am-1997-5-625 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract Otavite (CdCO3) recovered from experiments at P > 170 kbar and T ≈ 1000 °C contained material with the aragonite structure, indicating that a phase transition occurred. The lattice parameters of the aragonite-type CdCO3 are a = 4.989 ± 0.003, b = 7.822 ± 0.003, and c = 5.713 ± 0.004 Å at ambient conditions. The ambient molar volume is 33.57 ± 0.06 cm3, which is 2.1% smaller than that of otavite. The same kind of transition was not observed in rhodochrosite (MnCO3), which is stable at least up to 280 kbar at ~1000 °C. Lack of any observations of another phase transition type suggests that the aragonite-type structure is the only likely high-pressure modification of the smaller-cation carbonates such as MgCO3 at high pressures. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.