High pressure-high temperature equations of state of neon and diamond

作者: Agnès Dewaele , Frédéric Datchi , Paul Loubeyre , Mohamed Mezouar

DOI: 10.1103/PHYSREVB.77.094106

关键词:

摘要: We report accurate measurements of the equation state diamond and neon, measured by x-ray diffraction in a resistively heated diamond-anvil cell. The atomic volume single crystals embedded neon pressure-transmitting medium has been between 0 $80\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ from $300\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}900\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. is reported same $P\text{\ensuremath{-}}T$ range also up to $208\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ at room temperature. crystal structure remains face-centered cubic over domain investigation. show that Mie--Gr\"uneisen--Debye formalism reproduces very well present $P\text{\ensuremath{-}}V\text{\ensuremath{-}}T$ data for as low pressure--low temperature available literature. This makes calibrated pressure gauge, suitable high pressure--high studies. thermal behavior more complex cannot be completely described model. Its expansion decreases faster with increasing than predictions simple thermodynamic models.

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