Extending the single-crystal quartz pressure gauge up to hydrostatic pressure of 19 Gpa

Autor(en)

Katharina Sarah Scheidl, Alexander Kurnosov, Dmytro M. Trots, Tiziana Boffa Ballaran, Ross J. Angel, Ronald Miletich-Pawliczek

Abstrakt

In situ high-pressure diffraction experiments on single-crystal α-quartz under quasi-hydrostatic conditions up to 19 GPa were performed with diamond-anvil cells. Isotropic pressures were calibrated through the ruby-luminescence technique. A 4:1 methanol-ethanol mixture and the densified noble gases helium and neon were used as pressure media. The compression data revealed no significant influence of the pressure medium at room temperature on the high-pressure behavior of α-quartz. In order to describe its compressibility for use as a pressure standard, a fourth-order Birch-Murnaghan equation of state (EoS) with parameters K

_T0 = 37.0 (3) GPa, K

_T0′ = 6.7 (2) and K

_T0″ = -0.73 (8) GPa

^-1 was applied to fit the data set of 99 individual data points. The fit of the axial compressibilities yields M

_T0 = 104.5 (8) GPa, M

_T0′ = 13.7 (4), M

_T0″ = -1.04 (11) GPa

^-1 (a axis) and M

_T0 = 141 (3) GPa, M

_T0′ = 21 (2), M

_T0″ = 8.4 (6) GPa

^-1 (c axis), confirming the previously reported anisotropy. Assuming an estimated standard deviation of 0.0001% in the quartz volume, an uncertainty of 0.013 GPa can be expected using the new set of EoS parameters to determine the pressure.α-Quartz has been re-investigated up to 19 GPa in various pressure media to provide precise equation-of-state parameters for its wide applicability as an internal diffraction standard in high-pressure experiments with diamond-anvil cells.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Universität Bayreuth, Università degli Studi di Padova

Journal

Journal of Applied Crystallography

Band

49

Seiten

2129-2137

Anzahl der Seiten

9

ISSN

0021-8898

DOI

https://doi.org/10.1107/S1600576716015351

Publikationsdatum

09-2016

Peer-reviewed

Ja

ÖFOS 2012

105116 Mineralogie, 105113 Kristallographie

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Biochemie, Genetik und Molekularbiologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/085786ff-f0fa-4520-a764-3f35a0af562e