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| Keywords: DiamondAnvilCell 003.jpg This device enables scientists to study the effects of pressure on molecular interactions through infrared spectroscopy by permitting application of very high pressures to a specimen squeezed between Diamond Anvils Instruments like this one which was designed at NBS around 1960 are now used in many laboratories throughout the world for spectroscopy microscopy and x-ray diffraction In order to study the effects of very high pressure on molecular interactions finely powdered material is squeezed to a film between the flat surfaces of two gem-cut diamonds The facets which form the anvil have an area of about 0 1 mm and the diamonds are of Type II which is transparent to infrared radiation between 1750 -1 and 300 -1 Each diamond is mounted in a close-fitting recess in a piston of 1 cm diameter and having an axial hole which permits passage of the radiation beam The anvil faces can be adjusted to parallelism by means of a set of tiny leveling screws The entire assembly is sufficiently compact to be held on the stage of a microscope or placed in an infrared spectrometer or an x-ray diffractometer Anvil pressures up to 20 gigapascals 200 kilobars can be developed the force being applied to the anvil facets through the mounting pistons by compression of the helical spring acting through the 2 1 level system National Institute of Standards and Technology 1998-01-01 National Institute of Standards and Technology The images in the Diamond Anvil Cell Photographic Collection are in the public domain and are not subject to copyright in the United States However please pay special attention to the individual works to make sure there are no copyright restrictions indicated Individual works may require securing other permissions from the original copyright holder Use of the images from NIST Digital Collections is not restricted but a statement of attribution is required Please use the following attribution statement National Institute of Standards and Technology Digital Collections Gaithersburg MD 20899 PD-USGov National Bureau of Standards National Institute of Standards and Technology Diamond anvil cell | ||||
