PSJC #103 November 30 2011
Laboratory far-infrared spectroscopy of terrestrial phyllosilicates to
support planetary and astronomical remote sensing
We present far infrared spectra of terrestrial phyllosilicate minerals in
the wavelength range 15 - 250 μm to support interpretion of
returned data from far-IR space-missions such as the
Herschel Space Observatory. Seventeen phyllosilicates were
sampled from the American Museum of Natural History for
diversity and astrophysical relevancy, based on their
identification in Stardust, in stratospheric IDP samples,
or in meteorites. These include serpentines,
smectites, chlorites, micas, and kaolinites.
Spectra of ~micron-sized powder suspensions in
polyethelyne pellets reveal prominent and characteristic
far-IR features, which differ significantly in some cases
from already published spectra, where available.