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Displacement and strain fields around a [100] dislocation in olivine measured to sub-angstrom accuracy

  • Craig L. Johnson EMAIL logo , Martin J. Hÿtch and Peter R. Buseck
Published/Copyright: March 28, 2015
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American Mineralogist
From the journal American Mineralogist Volume 89 Issue 10

Abstract

We report the first measurement of deformation around a dislocation in olivine at the sub-nanometer scale. The displacement field around a [100] dislocation in olivine from San Carlos, Arizona, was measured using high-resolution transmission electron microscopy and geometric phase analysis. The results were compared with anisotropic elastic theory and are accurate to better than 0.09 Å. The displacements were used to calculate the strain tensor and rigid-body rotation. Together, this information provides a complete description of the local deformation of the crystal around the dislocation. These data could provide an empirical validation for both atomic-scale models of dislocations and mesoscale simulations of dislocation interactions. Details at both of these levels are necessary for a comprehensive forward modeling of mantle rheology.

Received: 2003-11-20
Accepted: 2004-4-24
Published Online: 2015-3-28
Published in Print: 2004-10-1

© 2015 by Walter de Gruyter Berlin/Boston

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https://doi.org/10.2138/am-2004-1004

Articles in the same Issue

  1. The origin of the color of pearls in iridescence from nano-composite structures of the nacre
  2. “Invisible„ gold revealed: Direct imaging of gold nanoparticles in a Carlin-type deposit
  3. Behavior of cation vacancy in kenotetrahedral Cr-spinels from Albanian eastern belt ophiolites
  4. Displacement and strain fields around a [100] dislocation in olivine measured to sub-angstrom accuracy
  5. Kiglapait mineralogy IV: The augite series
  6. Metasomatic formation of kosmochlor-bearing diopside in peridotite xenoliths from North Island, New Zealand
  7. Determination of standard thermodynamic properties of sulfides in the Ag-Au-S system by means of a solid-state galvanic cell
  8. Hydroxyl ordering in igneous apatite
  9. Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study of crystals synthesized at 2–4 GPa
  10. Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relations in the Mg2SiO4-SiO2-H2O system
  11. The activity of silica, water, and the equilibration of intermediate and silicic magmas
  12. The CO2–H2O system: IV. Empirical, isothermal equations for representing vapor-liquid equilibria at 110–350 °C, P ≤ 150 MPa
  13. Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: Combination of macroscopic and microscopic analyses
  14. The crystal-structure of synthetic NaNa2Mg5Si8O21(OH)3, a triclinic C1̄ amphibole with a triple-cell and excess hydrogen
  15. High-pressure phase transitions in Ca0.2Sr0.8Al2Si2O8feldspar
  16. Phase transition of Ca-perovskite and stability of Al-bearing Mg-perovskite in the lower mantle
  17. Mineralogy and petrology of a mullite-bearing pseudotachylyte: Constraints on the temperature of coseismic frictional fusion
  18. New developments in two-feldspar thermometry
  19. Ordered distribution of Au and Ag in the crystal structure of muthmannite, AuAgTe2, a rare telluride from Sacarîmb, western Romania
  20. Polytypism of cookeite in low-grade metapelites of the Cameros Basin, Spain: Lack of correlation of well-ordered polytypes with pressure
  21. Evolution of mineral compositions during eclogitization of subducting basaltic crust
  22. Mass balance during retrogression of eclogite-facies minerals in the Rongcheng eclogite, eastern Sulu ultrahigh-pressure terrane, China
  23. Synthesis of REE and Y phosphates by Pb-free flux methods and their utilization as standards for electron microprobe analysis and in design of monazite chemical U-Th-Pb dating protocol
  24. The chemistry and crystal structure of okanoganite-(Y) and comparison with vicanite-(Ce)
  25. An automated system for phase identification and quantitative composition determination using the electron microprobe: Theory and applications
  26. Piston-cylinder calibration at 400 to 500 MPa: A comparison of using water solubility in albite melt and NaCl melting
  27. Letter. Comparative planetary mineralogy: V/(Cr + Al) systematics in chromite as an indicator of relative oxygen fugacity
  28. Letter. Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14(⃞,Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation
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