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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Lizardite NMNHR4687 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: NMNHR4687
MINERAL_TYPE: Phyllosilicate
MINERAL: Lizardite (Kaolinite-Serpentine group)
FORMULA: Mg3Si2O5(OH)4
FORMULA_HTML: Mg3Si2O5(OH)4
COLLECTION_LOCALITY: Tyrol, Austria
ORIGINAL_DONOR: Smithsonian
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Forms series with Neupouite. Polymorphous with Antigorite, Clinochrysotile, Orthochrysotile, and Parachrysotile.
The sample was ground in an alumina mortar and pestle and wet sieved using methanol into <30µm (d), 60-104µm (c), 150-250µm (b) and >250µm (a) size fractions. The letter denotes spectrum designation.
IMAGE_OF_SAMPLE:
NO PHOTO
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS: This is a pure lizardite. Sample analysis by Norma Vergo.
Clark, R.N., T.V.V. King, M. Klejwa, G. Swayze, and N. Vergo, 1990, High spectral resolution reflectance spectroscopy of minerals: J. Geophys Res. 12653-12680.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: XRF # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION KEYWORD |
Oxide ASCII |
Amount | Weight Percent, % |
Oxide html |
|---|---|---|---|---|
| COMPOSITION: | SiO2 | 40.97 | wt% | SiO2 |
| COMPOSITION: | Fe2O3 | 5.55 | wt% | Fe2O3 |
| COMPOSITION: | MgO | 40.43 | wt% | MgO |
| COMPOSITION: | H2O | 13.80 | wt% | H2O |
| COMPOSITION: | Total | 100.75 | wt% | |
| COMPOSITION: | O=Cl,F,S | wt% | #correction for Cl, F, S | |
| COMPOSITION: | New Total | wt% |
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
This is an isochemical end member Mg-rich serpentine. Compositional data provided by Branch of Geochemistry, USGS, Denver.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Microscopically this is a pure lizardite.
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2a3a4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2c3b4_ # <30 microns # 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 2798 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib04a r 2809 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib04a r 2820 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib04a r 2831 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 4181 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 4194 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 4207 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 4220 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 12941 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 12954 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 12967 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 13011 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 13024 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 13068 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 13081 | g.s.= |