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Mapping the Residual Stress Distribution in Polycrystalline Quartz Tiger's Eye Using Raman Spectroscopy.

Genevieve C Kidman1,2, Ashkan Salamat1, Brian M Patterson2

  • 1Geoscience, University of Nevada Las Vegas, Las Vegas, Nevada, USA.

Small Methods
|March 11, 2026
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Summary
This summary is machine-generated.

This study maps grain-scale residual stresses in Tiger's Eye quartz using Raman spectroscopy. The technique reveals heterogeneous stress distributions, offering insights into polycrystalline material behavior.

Keywords:
polycrystalquartzraman spectroscopyresidual stressstress distributionstress map

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Area of Science:

  • Materials Science
  • Geology
  • Spectroscopy

Background:

  • Understanding stress distribution in polycrystalline materials is crucial for analyzing crystallite interactions.
  • Raman spectroscopy is sensitive to stress-induced wavenumber shifts in crystalline materials undergoing elastic strain.

Purpose of the Study:

  • To develop and validate a technique for experimentally measuring grain-scale residual stresses in polycrystalline quartz.
  • To create a residual stress map of Tiger's Eye quartz and characterize its stress distribution.

Main Methods:

  • Utilized spatially resolved Raman spectroscopy to measure residual stresses at the grain scale.
  • Validated the technique through evaluation of the resulting stress map and measurement accuracy.
  • Characterized geometric features of iron oxide inclusions within the quartz.

Main Results:

  • Generated a residual stress map of Tiger's Eye quartz exhibiting heterogeneous stress patterns with inter- and intra-granular detail.
  • Observed stress distribution characteristics similar to other polycrystalline materials.
  • Measured stress magnitudes consistent with previously reported values for polycrystalline quartz.

Conclusions:

  • The developed Raman spectroscopy technique accurately maps grain-scale residual stresses in Tiger's Eye quartz.
  • The study provides a detailed understanding of the heterogeneous stress state within the polycrystal.
  • New insights into the geometric nature of iron oxide inclusions in Tiger's Eye quartz were obtained.