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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(For further information on spectrsocopy, see: http://speclab.cr.usgs.gov)

TITLE: Pectolite NMNH94865 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: NMNH94865

MINERAL_TYPE: Inosilicate

MINERAL: Pectolite

FORMULA: NaCa2Si3O8(OH)

FORMULA_HTML: NaCa2Si3O8(OH)

COLLECTION_LOCALITY: Thetford, Ontario, Canada

ORIGINAL_DONOR: Smithsonian Institution

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Forms series with Serandite.

"Results of petrographic examination: Hand specimen consists of one small (1mm x 1cm) and one larger (5mm x 6mm x 1cm) fragment. The larger one has a large area of albite (1/4 of the sample). The rest is composed of pectolite needles. Under petrographic microscope, sample has 2% of an isotropic mineral. Fibrous nature of mineral precludes effective sieving. Fine fraction separated from coarse fraction by elutriation in acetone."

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 pectolite.

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: EM (WDS) # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION
KEYWORD
Oxide
ASCII
Amount Weight
Percent, %
Oxide
html
COMPOSITION: SiO2 53.37 wt% SiO2
COMPOSITION: TiO2 0.01 wt% TiO2
COMPOSITION: Al2O3 0.03 wt% Al2O3
COMPOSITION: FeO 0.11 wt% FeO
COMPOSITION: MnO 0.03 wt% MnO
COMPOSITION: MgO 0.03 wt% MgO
COMPOSITION: CaO 33.84 wt% CaO
COMPOSITION: Na2O 9.61 wt% Na2O
COMPOSITION: K2O 0.01 wt% K2O
COMPOSITION: Total 94.04 wt%

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

Microprobe analysis found the sample homogeneous within and between grains of pectolite. Average of 8 samples.

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 3831 0.2-3.0µm 200 g.s.= crs gr
LIB_SPECTRA: splib04a r 3841 0.2-3.0µm 200 g.s.= fm gr
LIB_SPECTRA: splib05a r 5353 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 5365 0.2-3.0µm 200 g.s.=


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