Physics and Chemistry of Minerals

, Volume 12, Issue 3, pp 132–140 | Cite as

Domain wall formation in minerals: I. theory of twin boundary shapes in Na-feldspar

  • E. Salje
  • B. Kuscholke
  • B. Wruck
Article
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Abstract

Domains of triclinic Na-feldspar which are a direct consequence of structural strain are investigated theoretically. The following conclusions are arrived at. Only two types of twin walls are created by spontaneous strain, namely the Albite- and Pericline twin walls. If intersections occur, rounded corners are predicted. Any third domain wall close to such an intersection must bend into an S-shape. Narrow domains between two twin walls tend to become needle-shaped close to the intersection with a further, perpendicular, twin wall. The combination of the elastic stiffness coefficients c44c66-c 46 2 is expected to become small at temperatures near to the transition temperature. In the same temperature interval elastic fluctuations occur; their amplitudes and propagation directions are given.

Keywords

Direct Consequence Transition Temperature Mineral Resource Domain Wall 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 1985

Authors and Affiliations

  • E. Salje
    • 1
  • B. Kuscholke
    • 1
  • B. Wruck
    • 1
  1. 1.Institut für Kristallographie und PetrographieUniversität HannoverHannoverWest Germany

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