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Issue 19, 2015
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In situ synchrotron X-ray diffraction with laser-heated diamond anvil cells study of Pt up to 95 GPa and 3150 K

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Abstract

Platinum (Pt) has been widely studied for pressure calibration in high pressure–temperature ranges. We have for the first time performed in situ synchrotron X-ray diffraction (XRD) with laser-heated diamond anvil cells to study the PVT equation of state (EOS) for Pt up to 95 GPa and 3150 K. MgO was used for pressure calibration. A detailed analysis of the room-temperature compression curve was fitted with the third-order Birch–Murnaghan (BM) EOS, which yields ambient volume V0 = 60.3 Å3, isothermal bulk modulus K0 = 308 GPa, and its pressure derivative K0 = 4.1. A least-squares fit of the PVT data to a high-temperature (BM) EOS yielded K0 = 5.5 ± 2, K0 = 274 ± 36 GPa, αKT(V0, T) = 0.003 ± 0.0003 GPa K−1 and (∂KT/∂T)V = 0.03 ± 0.01 GPa K−1 with V0 = 60.3 Å3. Within a reasonable range, it is found that the EOS of this study is consistent with the known EOS of Pt. The present technique and results cover the PT range between the resistive heating and the shock compression experimental data in the literature.

Graphical abstract: In situ synchrotron X-ray diffraction with laser-heated diamond anvil cells study of Pt up to 95 GPa and 3150 K

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Publication details

The article was received on 20 Oct 2014, accepted on 12 Jan 2015 and first published on 12 Jan 2015


Article type: Paper
DOI: 10.1039/C4RA12769B
Citation: RSC Adv., 2015,5, 14603-14609
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    In situ synchrotron X-ray diffraction with laser-heated diamond anvil cells study of Pt up to 95 GPa and 3150 K

    X. Huang, F. Li, Q. Zhou, G. Wu, Y. Huang, L. Wang, B. Liu and T. Cui, RSC Adv., 2015, 5, 14603
    DOI: 10.1039/C4RA12769B

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