Slip systems and critical resolved shear stress in pyrite: An electron backscatter diffraction (EBSD) investigation

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dc.contributor.authorBarrie, C D
dc.contributor.authorBoyle, A P
dc.contributor.authorCox, Stephen
dc.contributor.authorPrior, David J
dc.date.accessioned2015-12-13T22:48:28Z
dc.date.issued2009
dc.date.updated2016-02-24T09:41:57Z
dc.description.abstractA suite of experimentally deformed single-crystal pyrite samples has been investigated using electron backscatter diffraction (EBSD). Single crystals were loaded parallel to <100> or <110> and deformed at a strain rate of 10 -5 s -1, confining pressure of 300 MPa and temperatures of 600°C and 700°C. Although geometrically (Schmid factor) the {001}<100> slip system should not be activated in <100> loaded samples, lattice rotation and boundary trace analyses of the distorted crystals indicate this slip system is easier to justify. Determination of 75 MPa as the critical resolved shear stress (CRSS) for {001}<100> activation, in the <110> loaded crystals, suggests a crystal misalignment of ~5-15° in the <100> loaded crystals would be sufficient to activate the {001}<100> slip system. Therefore, {001}<100> is considered the dominant slip system in all of the single-crystal pyrite samples studied. Slip-system analysis of the experimentally deformed polycrystalline pyrite aggregates is consistent with the single-crystal findings, with the exception that {001}<110> also appears to be important, although less common than the {001}<100> slip system. The lack of crystal preferred orientation (CPO) development in the polycrystalline pyrite aggregates can be accounted for by the presence of two independent symmetrically equivalent slip systems more than satisfying the von Mises criterion.
dc.identifier.issn0026-461X
dc.identifier.urihttp://hdl.handle.net/1885/80111
dc.publisherMineralogical Society (UK)
dc.sourceMineralogical Magazine
dc.subjectKeywords: Confining pressures; Critical resolved shear stress; Crystal preferred orientations; Dislocations; Dominant slip system; EBSD; Electron back scatter diffraction; Lattice rotations; Polycrystalline; Schmid factors; Single-crystal; Slip system; Slip systems Critical resolved shear stress; Deformation; Dislocations; EBSD; Pyrite; Slip systems
dc.titleSlip systems and critical resolved shear stress in pyrite: An electron backscatter diffraction (EBSD) investigation
dc.typeJournal article
local.bibliographicCitation.issue6
local.bibliographicCitation.lastpage1199
local.bibliographicCitation.startpage1181
local.contributor.affiliationBarrie, C D, University of Liverpool
local.contributor.affiliationBoyle, A P, University of Liverpool
local.contributor.affiliationCox, Stephen, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationPrior, David J, University of Liverpool
local.contributor.authoremailu8410159@anu.edu.au
local.contributor.authoruidCox, Stephen, u8410159
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040300 - GEOLOGY
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
local.identifier.ariespublicationf5625xPUB8433
local.identifier.citationvolume72
local.identifier.doi10.1180/minmag.2008.072.6.1181
local.identifier.scopusID2-s2.0-69249222741
local.identifier.uidSubmittedByf5625
local.type.statusPublished Version

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