Rapid identification of steatite–enstatite polymorphs at various temperatures
Abstract
The mechanical properties of steatite ceramics after high-temperature processing depend on inversion of high-temperature Mg_2Si_2O_6 protoenstatite polymorph to low clino- or ortho-enstatite, which are characterized by Raman spectroscopy. The Raman spectrum of a pure Mg_2Si_2O_6 protoenstatite is sufficiently distinct from those of low clino- and ortho-enstatite to allow rapid identification in a bulk sample both at ambient and high temperatures. With its high-lateral resolution (about 2 μm), speed, and ease of application on rough materials, Raman spectroscopy can be used to map transformation sequences of enstatite in quenched materials or at high temperature during the fabrication of the steatite-type ceramics, and their relationship with microstructural defects such as voids and cracks.
Additional Information
© 2008 Elsevier Ltd. Received 20 December 2007; received in revised form 11 March 2008; accepted 15 March 2008. Available online 29 April 2008. Pascal Richet provided the ortho-enstatite samples and George Rossman provided the stabilized protoenstatite samples. The Institut National des Sciences de l'Univers supports the Raman facility at ENS Lyon. Additional support is provided through exchange program between CNRS and UIUC, and an invited professor position to JD Bass at ENS Lyon. This research was partially supported by the US National Science Foundation through a grant to JDB.Additional details
- Eprint ID
- 36430
- Resolver ID
- CaltechAUTHORS:20130116-133616942
- NSF
- Created
-
2013-01-17Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory, Division of Geological and Planetary Sciences