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: Kaolinite KGa-2 (pxl) DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: KGa-2

MINERAL_TYPE: Phyllosilicate

MINERAL: Kaolinite (Kaolinite-Serpentine group)

FORMULA: Al2Si2O5(OH)4

FORMULA_HTML: Al₂Si₂O₅(OH)₄

COLLECTION_LOCALITY: Warren County, GA

ORIGINAL_DONOR: Clay Mineral Society

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Polymorphous with Dickite, Halloysite, and Nacrite.

This sample is an excellent example of disordered kaolinite.

A spectrum for this sample was published by:

Clark, R.N., T.V.V. King, M. Klejwa, G. Swayze, and N. Vergo, 1990, High spectral resolution reflectance spectroscopy of minerals: J. Geophys Res. 12653-12680.

who noted that it was spectrally pure.

The spectrum from 2.5-25µm was published 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.

IMAGE_OF_SAMPLE:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Analysis by Norma Vergo indicates the sample is kaolinite + trace anatase.

END_XRD_ANALYSIS.

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

COMPOSITION
KEYWORD Oxide
ASCII Amount Weight
Percent, % Oxide
html

COMPOSITION: SiO2 44.2 wt% SiO₂

COMPOSITION: TiO2 2.17 wt% TiO₂

COMPOSITION: Al2O3 37.2 wt% Al₂O₃

COMPOSITION: Fe2O3 1.14 wt% Fe₂O₃

COMPOSITION: FeO 0.05 wt% FeO

COMPOSITION: MnO 0.00 wt% MnO

COMPOSITION: MgO 0.04 wt% MgO

COMPOSITION: CaO 0.04 wt% CaO

COMPOSITION: Na2O 0.02 wt% Na₂O

COMPOSITION: K2O 0.02 wt% K₂O

COMPOSITION: P2O5 0.06 wt% P₂O₅

COMPOSITION: F 0.020 wt% F

COMPOSITION: Total 99.18 wt%

COMPOSITION: O=Cl,F,S wt% #correction for Cl, F, S

COMPOSITION: New Total wt%

COMPOSITION KEYWORD	Oxide ASCII	Amount	Weight Percent, %	Oxide html
COMPOSITION:	SiO2	44.2	wt%	SiO₂
COMPOSITION:	TiO2	2.17	wt%	TiO₂
COMPOSITION:	Al2O3	37.2	wt%	Al₂O₃
COMPOSITION:	Fe2O3	1.14	wt%	Fe₂O₃
COMPOSITION:	FeO	0.05	wt%	FeO
COMPOSITION:	MnO	0.00	wt%	MnO
COMPOSITION:	MgO	0.04	wt%	MgO
COMPOSITION:	CaO	0.04	wt%	CaO
COMPOSITION:	Na2O	0.02	wt%	Na₂O
COMPOSITION:	K2O	0.02	wt%	K₂O
COMPOSITION:	P2O5	0.06	wt%	P₂O₅
COMPOSITION:	F	0.020	wt%	F
COMPOSITION:	Total	99.18	wt%
COMPOSITION:	O=Cl,F,S		wt%	#correction for Cl, F, S
COMPOSITION:	New Total		wt%

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

Analysis by C.V.Clemency, Dept. of Geological Sciences, SUNY at Buffalo, Buffalo N.Y. for the Clay Minerals Society. Fluorine analysis by J. Thomas Jr., Illinois State Geological Survey, Urbana, Ill, and is not included in the total.

Published in: van Olphen, H. and J.J. Fripiat, eds., 1979, Data handbook for clay materials and other non-metallic minerals, Pergamon Press, New York, p128.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3b4b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns