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High Pressure Research
An International Journal
Volume 6, 1990 - Issue 2
122
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Original Articles

Effect of non-hydrostaticity on the α-ε transition of iron

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Pages 133-140 | Received 26 Jan 1990, Accepted 09 Jul 1990, Published online: 19 Aug 2006
 

Abstract

The α-ε transition of iron was measured resistively and by X-ray in a diamond anvil cell using a variety of pressure media. The transition pressures and the hysteresis change systematically with the shear strength of the pressure medium. The width of the hysteresis varies significantly with increasing shear strength from large positive to large negative, but the hystereses in all experiments are centered around 130 k 7 kbar. The pressure interval of the forward transition increases with increasing non-hydrostaticity and provides a quantitative measure of the shear strength of a material at very high pressures.

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