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  U. S. Geological Survey Minerals FT-IR Spectral Library                    
 
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The U. S. Geological Survey Minerals Library is an infrared spectral library of 78 minerals. Most of the minerals are silicates. The majority of the mineral samples were acquired from the Smithsonian National Museum of Natural History. Other samples were made available by the Hunt and Salisbury collection in Denver, CO; staff members of the USGS; the Clay Mineral Society Source Clay Mineral Repository; the University of Massachusetts; Princeton University; Harvard University; Arizona State University; and Burminco. Thermo Scientific has acquired permission to copy and distribute the library.

The spectra were originally acquired at 4 cm-1 digital resolution and were mathematically deresolved before adding them to the library.

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