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A sample of magnesium oxalate, confined within a 100 μm diameter beryllium gasket, pressurized inside of a Diamond Anvil Cell to about 100,000 times atmospheric pressure. The picture was taken with an optical microscope looking through a diamond. The sample was irradiated with 10 keV x-rays produced at the Advanced Photon Source at the Argon National Lab in Chicago. The yellow area shows material that has been decomposed to a doped form of polymeric carbon monoxide by exposure to hard x-rays, while white area is unadulterated Magnesium Oxalate.