#DISTRIBUTEDBY=Aerosol Refractive Index Archive (www.atm.ox.ac.uk/project/RI/) #DESCRIPTION=Ground sample collected in Bozeman Montana. #SUBSTANCE=Mt. St. Helens ash May 18 1980 eruption #SAMPLEFORM=Solid #TEMPERATURE= #CONCENTRATION= #DOI=10.1126/science.211.4484.836 #REFERENCE= E. Patterson, measurement of the imaginary refractive index ##between 300 and 700nm of Mount St. Helens ash, Science, 211, 1981 #CONTACT= #COMMENT=Digitised from publication graph, absolute accuracy is unknown. #FORMAT=WAVL K 0.30151476 0.0090653701 0.31146227 0.0090660201 0.32551247 0.0077930498 0.34893305 0.0060816202 0.39959552 0.0051851301 0.45068644 0.0047686002 0.48685895 0.0045159701 0.51892643 0.0043492201 0.54850273 0.0042239800 0.59586635 0.0040513398 0.63822744 0.0039349901 0.66545425 0.0038864000 0.70023746 0.0038064399