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: 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: 1_2_3_4_

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 ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=