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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Rhodonite NMNHC6148 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: NMNHC6148
MINERAL_TYPE: Inosilicate
MINERAL: Rhodonite
FORMULA: (Mn+2,Fe+2,Mg,Ca)SiO3
FORMULA_HTML: (Mn+2,Fe+2,Mg,Ca)SiO3
COLLECTION_LOCALITY: Franklin, New Jersey
ORIGINAL_DONOR: Smithsonian Institution
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
"Results of petrographic examination: Hand sample is composed of two fragments, each about 2cm x 2cm x 1cm. About one third of each is host rock on which the rhodonite crystals grow. This was removed by sawing to free pure rhodonite. Under petrographic microscope, many other grains show a small degree of alteration (not identified)."
Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Pure rhodonite.
Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263.
Pure (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 | 46.30 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 0.07 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 0.05 | wt% | Al2O3 |
| COMPOSITION: | FeO | 0.50 | wt% | FeO |
| COMPOSITION: | MnO | 40.17 | wt% | MnO |
| COMPOSITION: | MgO | 0.41 | wt% | MgO |
| COMPOSITION: | CaO | 8.27 | wt% | CaO |
| COMPOSITION: | Na2O | 0.28 | wt% | Na2O |
| COMPOSITION: | K2O | 0.04 | wt% | K2O |
| COMPOSITION: | Total | 96.09 | wt% |
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
"Results of XRF or other compositional analysis: Microprobe analysis shows sample is homogeneous between and within grains. Average of six analyses."
Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_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 4198 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 5927 | 0.2-3.0µm | 200 | g.s.= |
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