#DISTRIBUTEDBY=Aerosol Refractive Index Archive (www.atm.ox.ac.uk/project/RI/)
#DESCRIPTION=Ash El Chich&oacute;n, sample at 23km,
## 45 % feldspar,
## 30 % volcanic glass 
## 20 % colored minerals (primarily botite, hornblende and some apatite)
## 5 % opaque particles (probably mangetite).
#SUBSTANCE=El Chich&oacute;n Ash
#SAMPLEFORM=Solid
#TEMPERATURE=
#CONCENTRATION=
#DOI=10.1029/gl010i004p00317
#REFERENCE=Edward M. Patterson, C.O. Pollard, Optical properties of the ash
## from El Chich&oacute;n volcano, Geophysical Research Letters, 10, 4,
## 317-320, April 1983.
#CONTACT=
#COMMENT=Digitised from publication graph, absolute accuracy is unknown.
#FORMAT=WAVL K
      0.30072466    0.0033064201
      0.32173857    0.0024557400
      0.35209794    0.0016701600
      0.40036497    0.0012140300
      0.45072463    0.0012151300
      0.50209795    0.0011383800
      0.55107913    0.0011520700
      0.60143887    0.0011156000
      0.63453205    0.0012058800
      0.65177308    0.0012331600
      0.70143887    0.0012207601
