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Fig. 9. (Color online) Microphotographs of ruby chip, tungsten foil, and N2 and CO (3:7 in a volume fraction) mixture to 49.6 GPa, showing the pressure-induced polymerization from a transparent mixture to initially a homogeneous light-brown solid at 17.1 GPa and then a homogeneous dark-brown solid above 21.5 GPa.
New Phys.: Sae Mulli 2021;71:938~948