Open AccessStrategies for reducing preferred orientation and strain in powder samples for high‐pressure synchrotron X‐ray diffraction in diamond‐anvil cells
Author(s) -
Tschauner Oliver,
McClure Jason,
Nicol Malcolm
Publication year - 2005
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049505023575
Subject(s) - diamond anvil cell , synchrotron , diffraction , materials science , strain (injury) , powder diffraction , diamond , orientation (vector space) , x ray crystallography , crystallite , high pressure , yield (engineering) , x ray , crystallography , analytical chemistry (journal) , optics , composite material , metallurgy , thermodynamics , chemistry , geometry , physics , chromatography , mathematics , medicine
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.