DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS41
MINERAL_TYPE: Phyllosilicate
MINERAL: Nontronite (Fe-bearing Smectite) (Montmorillonite group)
FORMULA: Na0.33(Fe+3)2(Si,Al)4O10*nH20
FORMULA_HTML: Na0.33Fe+32(Si,Al)4O10•nH2O
COLLECTION_LOCALITY: Wigwam Creek
ORIGINAL_DONOR: None
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Chartruse nontronite.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
None
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: XRF # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION: | SiO2 | 30.7 | wt% | SiO2 |
| COMPOSITION: | TiO2 | <0.02 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 20.1 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | 23.0 | wt% | Fe2O3 |
| COMPOSITION: | MnO | 0.19 | wt% | MnO |
| COMPOSITION: | MgO | 12.5 | wt% | MgO |
| COMPOSITION: | CaO | 0.77 | wt% | CaO |
| COMPOSITION: | Na2O | <0.15 | wt% | Na2O |
| COMPOSITION: | K2O | 0.62 | wt% | K2O |
| COMPOSITION: | P2O5 | <0.05 | wt% | P2O5 |
| COMPOSITION: | LOI | 12.70 | wt% | LOI |
| COMPOSITION: | Total | 100.58 | wt% | |
| COMPOSITION: | O=Cl,F,S | wt% | #correction for Cl, F, S | |
| COMPOSITION: | New Total | 100.58 | wt% |
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
Sample from Eugene Foord, USGS, Denver, Colorado.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1_2_3_4_
LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment
LIB_SPECTRA: splib04a r 3483 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=