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Bayerisches Geoinstitut, Universität Bayreuth, D 95440 Bayreuth, Germany
* E-mail: arlt{at}gmx.ch
The clinopyroxenes kanoite and spodumene were studied by single-crystal X-ray diffraction in a diamond anvil cell (DAC) at room temperature. At the displacive phase transitions between the C2/c and P21/c polymorphs both phases coexist within the same crystal. In this two-phase region the pressure in the DAC remains constant. The experimental results demonstrate that pressure buffering at first-order phase transitions can occur in the DAC.
KEYWORDS: Pressure buffering, diamond anvil cell, phase transition, single-crystal X-ray diffraction, clinopyroxene, kanoite, spodumene
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