Pressure-volume X-ray diffraction data were collected at eight pressures to 17.2 GPa for synthetic single-crystal forsterite, Mg2Si04. Birch-Murnaghan equation-of-state parameters were determined to be Ko = 125(2) GPa and K~ = 4.0(4). To ensure hydrostatic conditions, we monitored the diffraction-peak shapes while the sample was in different pressure media: 4:1 methanol-ethanol, He, and Ar. The...

Goldblatt argues that a decrease in pressure broadening of absorption lines in an atmosphere with low oxygen leads to an increase in outgoing longwave radiation and atmospheric cooling. We demonstrate that cloud and water vapor feedbacks in a global climate model compensate for these decreases and lead to atmospheric warming.

This work is an experimental study about the effects of gas pressure and magnetic field on plasma characteristics produced in internal hollow electrodes discharge (HED) system. The results show that breakdown voltage values increase with increasing working (especially presence a field). depends p.d. product, where p d distance between electrodes. While current decrease pressure. temperature ele...

Through the analysis of peak broadening of energy-dispersive diffraction lines from a powdered sample, the yield strength of a-Si3N4 was investigated at a pressure of 9 GPa and temperatures up to 12341C. During compression at room temperature, the lattice strain deduced from peak broadening increased linearly with pressure up to 9.2 GPa, with no clear indication of strain saturation. While heat...

Introduction: Peak broadening recognized in X-ray diffraction (XRD) and micro-Raman (MRS) spectra of experimentally and naturally shock-metamorphosed carbonates from carbonate-target bo-lide impact structures has been shown to be a reliable indicator of impact-related shock-metamorphism [1-7]. However, studies have not yet shown whether this peak broadening is unique to or diagnostic of all car...