DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: EN124
MINERAL_TYPE: Phyllosilicate
MINERAL: Roscoelite (vanadium mica) (Mica group)
FORMULA: KV2(AlSi3O10)(OH)2
FORMULA_HTML: KV2(AlSi3O10)(OH)2
COLLECTION_LOCALITY: Carpenter Mine, along Bear Creek in SW Colorado, Sec 33 T43N R10W, Long 107 58' 45" Lat 37 56' 40" 600 feet from the portal of the Carpenter Mine
ORIGINAL_DONOR: George Breit
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Less than 2 µm clay seperate prepared from a sample of V-U ore from the Late Jurassic Entrada Sandstone.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Illite and illite-smectite with < 15% smectite interlayers. No other minerals were detected (personal communication from G. Breit, 1990)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: Unknown # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION: | TiO2 | 0.12 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 27.2 | wt% | Al2O3 |
| COMPOSITION: | Cr2O3 | <0.02 | wt% | Cr2O3 |
| COMPOSITION: | V2O3 | 10.0 | wt% | V2O3 |
| COMPOSITION: | Fe2O3 | *0.66 | wt% | Fe2O3 |
| COMPOSITION: | MnO | 0.01 | wt% | MnO |
| COMPOSITION: | MgO | 0.64 | wt% | MgO |
| COMPOSITION: | Na2O | 0.04 | wt% | Na2O |
| COMPOSITION: | K2O | 9.07 | wt% | K2O |
| COMPOSITION: | Total | 47.76 | wt% |
COMPOSITION_TRACE: Ca < 20 ppm
COMPOSITION_DISCUSSION:
* All Fe reported given as total Fe wt% (includes both FeO and Fe2O3.
Done by George Breit.
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 4273 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.=