SAMPLE_ID: WS319 crystal
COLLECTION_LOCALITY: Snowbird Mine, Mineral County, Montana, USA
ORIGINAL_DONOR: Wards Scientific
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION: Dark brown single hexagonal crystal in a dolomite-rich matrix also present as an entry in the USGS spectral database with the same catalog number WS319.
X-ray diffraction analysis found parisite in a chip from the dark brown crystal. R. Driscoll.
Parisite is the only crystalline phase observed in the XRD scan. REE content confirmed by survey chemistry. B. Benzel.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
SPECTROSCOPIC_DISCUSSION: The spectrum of this sample was measured on a brown crystal of parisite so should be representative of pure parisite. There are numerous sharp absorptions (f-f orbital electronic transitions) throughout the 0.35 to 1.3 micron region presumably due to variable proportions of lanthanide series rare earth elements (i.e., Nd, Sm, and others). G. Swayze.
SPECTRAL_PURITY: 1a2_3_4_ # WS319 crystal # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns