Pasadena,
Ca 91125 USA
Data from this site and new
data collected at Caltech are now joined into a large composite
database that combines the American
Mineralogist Crystal Structure Database, numerous
Raman spectra obtained at Arizona State University, and
infrared spectra. This database has chemical analyses, X-ray
diffraction parameters, Raman spectra, infrared spectra, and will
ultimately have other types of data in a convenient, single database
known
as the:
The
data collected at Caltech have been collected on two different
systems.
1)
Formerly, we used a Kaiser Optical Systems, Inc. HoloProbe
785 Raman Spectrometer with a probe head from EIC
Laboratories, Inc. It operated in a continuous mode
at 785 nm with a 190 mW output capacity. A variety of minerals
were analyzed, choosing samples that ranged from transparent and
highly polished to rough and dirty. Depending on the
quality of the sample, different scan times were needed.
Data were collected with unpolarized incident light; no
polarization information was determined for the scattered
light.
2) We
now use a Renishaw M1000
MicroRaman
Spectrometer system with a choice of an argon ion laser (514.5
nm) or a solid state laser (785 nm). Excitation and
collection is through a Leica optical microscope with objective
lenses ranging from 5× to 100×. The data
obtained from
this system in the tables below were obtained with a wedge
depolarizer in the incident beam to nearly eliminate the effects of orientation and polarization.
Where noted, light is incident normal to face specified. Go
here for further information on sample orientation. Some
caution is necessary: some samples show narrow bands of
fluorescence from rare-earth elements or broad bands of
fluorescence from transition metal ions and other causes.
Alphabetical
Listing of Mineral
Samples
- Visit
the Mineral Spectroscopy Server for an extensive list of
other spectroscopic data
- Do
you have Raman spectra or minerals to contribute? Contact the RRUFF project.
Comments? Suggestions?
Requests? Data to Contrubute? email George Rossman. (grr
@ gps.caltech.edu)
California
Institute of
Technology
Division of Geological and Planetary
Sciences
MS 170-25
Pasadena, California 91125 US
Last
update: 31-Dec-2009
