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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Rectorite RAr-1 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: RAr-1
MINERAL_TYPE: Phyllosilicate
MINERAL: Rectorite
FORMULA: Al2Si4O10(OH)2 + (Mg,Fe+2,Al)3(Al,Si)4O10(OH)2*4H2O
FORMULA_HTML: Al2Si4O10(OH)2 + (Mg,Fe+2,Al)3(Al,Si)4O10(OH)2•4H2O
COLLECTION_LOCALITY: Garland County, Arizona
ORIGINAL_DONOR: Grim Collection?
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Rectorite, a clay mineral, is a regular interstratification of a dioctahedral mica and a dioctahedral smectite.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Rectorite + chlorite + muscovite; < 2µm cut rectorite + trace chlorite + trace muscovite M: 10-15% quartz, 2% chlorite, 2% opaque, no HCl fizz (Norma Vergo)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: XRF # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION KEYWORD |
Oxide ASCII |
Amount | Weight Percent, % |
Oxide html |
|---|---|---|---|---|
| COMPOSITION: | SiO2 | 72.8 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 0.31 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 16.9 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | 1.22 | wt% | Fe2O3 |
| COMPOSITION: | FeO | 0.38 | wt% | FeO |
| COMPOSITION: | MnO | less than 0.02 | wt% | MnO |
| COMPOSITION: | MgO | 0.26 | wt% | MgO |
| COMPOSITION: | CaO | 0.09 | wt% | CaO |
| COMPOSITION: | Na2O | 1.11 | wt% | Na2O |
| COMPOSITION: | K2O | 0.45 | wt% | K2O |
| COMPOSITION: | P2O5 | 0.07 | wt% | P2O5 |
| COMPOSITION: | H2O+ | 4.75 | wt% | H2O+ |
| COMPOSITION: | H2O- | 1.49 | wt% | H2O- |
| COMPOSITION: | H2O | 6.24 | wt% | H2O |
| COMPOSITION: | LOI | 6.16 | wt% | LOI |
| COMPOSITION: | Total | wt% | ||
| COMPOSITION: | O=Cl,F,S | wt% | #correction for Cl, F, S | |
| COMPOSITION: | New Total | wt% |
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
Analysts: E. Brandt, H. H. Christie
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1d2_3_4_ # 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 4166 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5878 | 0.2-3.0µm | 200 | g.s.= |
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