Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 5, 2010
Previous Article Next Article

Helical chain observed under transmission electron microscope: Synthesis and structure refinement of lutetium disilicate Lu2Si2O7

Author affiliations

Abstract

Crystals of lutetium disilicate (Lu2Si2O7) have been synthesized at 4 GPa and 1200 °C, using a piston-cylinder type high-pressure apparatus. Systematic single-crystal X-ray structure analysis shows that Lu2Si2O7, type X is enantiomorphic in space groups P41212 (structure 1) and P43212 (structure 2). Unit cell parameters are a = 6.5620(2), c = 11.9535(4) Å (1, space group P41212) and a = 6.5621(9), c = 11.954(2) Å (2, space group P43212), respectively. The crystal structures of the two enantiomers are based on helical chains of Lu cations linked by [Si2O7]6− groups, which are parallel to each other and possess the same chirality, being right-handed for structure 1 and left-handed for structure 2. More interesting is that we have directly observed the helical chain under high-resolution transmission electron microscopy (HRTEM).

Graphical abstract: Helical chain observed under transmission electron microscope: Synthesis and structure refinement of lutetium disilicate Lu2Si2O7

Back to tab navigation

Supplementary files

Article information


Submitted
21 Sep 2009
Accepted
15 Dec 2009
First published
14 Jan 2010

CrystEngComm, 2010,12, 1617-1620
Article type
Paper

Helical chain observed under transmission electron microscope: Synthesis and structure refinement of lutetium disilicate Lu2Si2O7

C. Wang, X. Liu, M. E. Fleet, J. Li, S. Feng, R. Xu and Z. Jin, CrystEngComm, 2010, 12, 1617
DOI: 10.1039/B919658G

Social activity

Search articles by author

Spotlight

Advertisements