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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

TITLE: Rhodonite NMNHC6148 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: NMNHC6148 >250um

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.

IMAGE_OF_SAMPLE:
Photo of sample

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, EPMA, 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: 1b2b3b4u # NMNHC6148 >250um # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns