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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Spessartine WS480 Garnet DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: WS480
MINERAL_TYPE: Nesosilicate
MINERAL: Spessartine (Garnet group)
FORMULA: Mn3Al2(SiO4)3
FORMULA_HTML: Mn3Al2(SiO4)3
COLLECTION_LOCALITY: Ely, Nevada
ORIGINAL_DONOR: Ward Natural Science Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Forms series with Almandine.
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 7.3-9.5 keV
File: spes480.out, *.mdi (smear mount on quartz plate)
References: Borg and Smith (1969), JCPDS #10354, DHZ, v. 1a (1982),
Huebner's reference patterns
Found: Garnet, minor quartz
Comment: Peaks moderately sharp, probably to be interpreted as good crystallinity with a small range of cell dimension (range of composition). The garnet ao=11.55, consistent with (but not proving) spessartine-rich composition. Quartz identification based on only two reflections.
J.S. Huebner, J. Pickrell, T. Schaefer, written communication 1994
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2c3c4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
| LIB_SPECTRA_HED: | where | Wave Range | Av_Rs_Pwr | Comment |
|---|---|---|---|---|
| LIB_SPECTRA: | splib04a r 4520 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6296 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 20849 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 20861 | g.s.= |