Extended Data Fig. 3: Synchrotron XRD of an NDCs sample synthesized at 34.5 GPa.
From: Preservation of high-pressure volatiles in nanostructured diamond capsules
The XRD pattern (black circles) of a recovered NDCs sample synthesized at ~34.5 GPa and ~2200 K. The sample is also composed of cubic diamond and fcc high-pressure argon according to the Rietveld refinement (red curve). The x-ray wavelength was 0.4066 Å. This result demonstrates that with different synthesis conditions of a NDCs sample the peaks from diamond can be better separated from those of argon compared with the case in Fig. 3a.
