U.S. Geological Survey home page


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: Pyrophyllite PYS1A DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: PYS1A GDS29

MINERAL_TYPE: Phyllosilicate

MINERAL: Pyrophyllite

FORMULA: Al2Si4O10(OH)2

FORMULA_HTML: Al2Si4O10(OH)2

COLLECTION_LOCALITY: Staley, NC

ORIGINAL_DONOR: Bruce Hemingway

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

less than 850um

Hand samples are clusters of white radiating acicular crystals which appear pure.

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 pyrophyllite.

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_XRD_ANALYSIS.

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

COMPOSITION
KEYWORD
Oxide
ASCII
Amount Weight
Percent, %
Oxide
html
COMPOSITION: SiO2 66.32 wt% SiO2
COMPOSITION: TiO2 0.01 wt% TiO2
COMPOSITION: Al2O3 28.27 wt% Al2O3
COMPOSITION: Fe2O3 0.32 wt% Fe2O3
COMPOSITION: FeO 0.03 wt% FeO
COMPOSITION: MgO 0.07 wt% MgO
COMPOSITION: Na2O 0.05 wt% Na2O
COMPOSITION: K2O 0.02 wt% K2O
COMPOSITION: H2O+ 4.94 wt% H2O+
COMPOSITION: Total 100.03 wt%

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

See additional discussion in:

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 4060 0.2-3.0µm 200 g.s.= 25 µm
LIB_SPECTRA: splib04a r 4071 0.2-3.0µm 200 g.s.= 125 µm
LIB_SPECTRA: splib05a r 5718 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 5731 1.3-5.3µm 200 g.s.=
LIB_SPECTRA: splib05a r 5771 0.2-3.0µm 200 g.s.=


USA.gov logo  Take Pride in America button