Physics and Chemistry of Minerals

, Volume 9, Issue 5, pp 229–234 | Cite as

High resolution electron microscopic studies on ferrosilite III

  • M. Czank
  • B. Simons
Article
Received:

Abstract

High resolution transmission electron microscopic (HRTEM) studies on ferrosilite (Fs) III confirmed the periodicity nine (p=9) of the tetrahedral chains in this silicate. Various chain periodicity faults (CPFs) have been observed and faults with “elfer” units (p′=11) dominate. CPFs with p′≫9 were observed and are interpreted as pyroxene like slabs. Synthesis of Fs III under extended run duration demonstrated that Fs III actually is the stable phase in the system FeSiO3 at high pressures and high temperatures. However, the stability fields of Fs III and orthoferrosilite might be separated by a narrow field of a FeSiO3 polymorph with “elfer” single chain. This field has not been bracketed so far. New structure variants of Fs are discussed. Reconnaissance experiments on the kinetics of CPFs are reported.

Keywords

Silicate High Resolution Transmission Electron Microscopic Structure Variant Microscopic Study Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • M. Czank
    • 1
  • B. Simons
    • 1
  1. 1.Mineralogisches Institut der UniversitätKielWest Germany

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