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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Endellite GDS16 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS16
MINERAL_TYPE: Phyllosilicate
MINERAL: Endellite (Hydrohalloysite) (Kaolinite-Serpentine Group)
FORMULA: Al2Si2O5(OH)4*2H20
FORMULA_HTML: Al2Si2O5(OH)4•2H20
COLLECTION_LOCALITY: Joshin Mine, Tsumagoi-mura Azuma-gun, Gunma
ORIGINAL_DONOR: Grim Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
None
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
7A halloysite - no expansion with glycol. Pure. (Norma Vergo)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
None
COMPOSITION_DISCUSSION:
None
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Mode:
97 vol% clay
2 vol% green material (too small to identify optically)
1 vol% opaques
average grain size= less than 10 µm
Grain size too small to determine optical properties. G. Swayze.
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2b3b4b # 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 1529 | 0.2-3.0µm | 200 | g.s.= less than 10 µm |
| LIB_SPECTRA: | splib05a r 2548 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 7379 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 7391 | g.s.= |