Strategies for reducing preferred orientation and strain in powder samples for high-pressure synchrotron X-ray diffraction in diamond-anvil cells

Journal Article · Tue Jul 20 00:00:00 EDT 2010 · J. Synchrotron Rad.

OSTI ID:1008632

Tschauner, Oliver; McClure, Jason; Nicol, Malcolm ^[1]

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1. UNLV

Among the many problems associated with high-pressure X-ray diffraction from polycrystalline samples in the diamond-anvil cell are strain and preferred orientation. A method is presented for efficiently reducing preferred orientation of powder samples compressed in diamond-anvil cells to pressures in excess of 20 GPa. This method may be successfully applied to samples of yield strength higher than alkalihalides. In addition, the problem of strain is discussed using ice-VII as an example and as an illustration of the importance of laser heating as a method of minimizing strain.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1008632
• Journal Information: J. Synchrotron Rad., Journal Name: J. Synchrotron Rad. Journal Issue: (5) ; 2005 Vol. 12; ISSN 0909-0495; ISSN JSYRES
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
ANNEALING
DIFFRACTION
GRAIN ORIENTATION
HEATING
LASERS
STRAINS
SYNCHROTRONS
X-RAY DIFFRACTION
YIELD STRENGTH