Sample Description USGS Spectral Library Version 7

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: Pyrophyllite PYS1A DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: PYS1A >250um, PYS1A <850um, PYS1A fine gr, PYS1A <5um (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.

IMAGE_OF_SAMPLE:

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, EPMA, 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 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_ # PYS1A >250um # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1a2a3a4a # PYS1A <850um # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1a2a3a4a # PYS1A fine gr # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1a2_3_4_ # PYS1A <5um # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns