TY - JOUR
T1 - Crystal morphology and dislocation microstructures of CaIrO3
T2 - A TEM study of an analogue of the MgSiO3 post-perovskite phase
AU - Miyajima, Nobuyoshi
AU - Ohgushi, Kenya
AU - Ichihara, Masaki
AU - Yagi, Takehiko
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/6/28
Y1 - 2006/6/28
N2 - Polycrystalline CaIrO3 phase, synthesized in a cubic-anvil type high pressure apparatus at 4 GPa and 1473 K, has been investigated using transmission electron microscopy (TEM). Individual crystallites have a platy crystal habit elongated parallel to the crystallographic a-axis, which is the direction of the edge-shared octahedral chain. The dislocations with Burgers vectors b = [100] and (u0w) nucleated in the CaIrO3 phase during the synthesis experiments. The potential slip plane could be (010), the most likely having with the (010)-layered structure of IrO6 octahedrons. The crystal morphology and dislocation microstructures of CaIrO3 should provide important constraints for the discussion of the deformation behaviour and polarization anisotropy of the post-perovskite phase in the lowermost mantle.
AB - Polycrystalline CaIrO3 phase, synthesized in a cubic-anvil type high pressure apparatus at 4 GPa and 1473 K, has been investigated using transmission electron microscopy (TEM). Individual crystallites have a platy crystal habit elongated parallel to the crystallographic a-axis, which is the direction of the edge-shared octahedral chain. The dislocations with Burgers vectors b = [100] and (u0w) nucleated in the CaIrO3 phase during the synthesis experiments. The potential slip plane could be (010), the most likely having with the (010)-layered structure of IrO6 octahedrons. The crystal morphology and dislocation microstructures of CaIrO3 should provide important constraints for the discussion of the deformation behaviour and polarization anisotropy of the post-perovskite phase in the lowermost mantle.
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U2 - 10.1029/2005GL025001
DO - 10.1029/2005GL025001
M3 - Article
AN - SCOPUS:33750620964
VL - 33
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 12
M1 - L12302
ER -