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: Saponite SapCa-1 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: SapCa-1, SapCa-1.AcB

MINERAL_TYPE: Phyllosilicate

MINERAL: Saponite (Montmorillonite group)

FORMULA: (1/2Ca,Na)0.33(Mg,Fe+2)3(Si,Al)4O10(OH)2*4H2O

FORMULA_HTML: (½Ca,Na)_0.33(Mg,Fe⁺²)₃(Si,Al)₄O₁₀(OH)₂•4H₂O

COLLECTION_LOCALITY: Ballarat, California

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

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:

Less than 2µ size fraction is saponite with a trace of unknown material with x-ray peaks at 8.6, 3.26 and 3.14 Angstroms. Coarser fraction contains quartz.

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 51.9 wt% SiO₂

COMPOSITION: TiO2 0.54 wt% TiO₂

COMPOSITION: Al2O3 3.66 wt% Al₂O₃

COMPOSITION: Fe2O3 0.88 wt% Fe₂O₃

COMPOSITION: MnO less than 0.02 wt% MnO

COMPOSITION: MgO 0.88 wt% MgO

COMPOSITION: CaO 4.68 wt% CaO

COMPOSITION: Na2O 1.94 wt% Na₂O

COMPOSITION: K2O 0.41 wt% K₂O

COMPOSITION: LOI 11.5 wt% LOI

COMPOSITION: Total wt%

COMPOSITION KEYWORD	Oxide ASCII	Amount	Weight Percent, %	Oxide html
COMPOSITION:	SiO2	51.9	wt%	SiO₂
COMPOSITION:	TiO2	0.54	wt%	TiO₂
COMPOSITION:	Al2O3	3.66	wt%	Al₂O₃
COMPOSITION:	Fe2O3	0.88	wt%	Fe₂O₃
COMPOSITION:	MnO	less than 0.02	wt%	MnO
COMPOSITION:	MgO	0.88	wt%	MgO
COMPOSITION:	CaO	4.68	wt%	CaO
COMPOSITION:	Na2O	1.94	wt%	Na₂O
COMPOSITION:	K2O	0.41	wt%	K₂O
COMPOSITION:	LOI	11.5	wt%	LOI
COMPOSITION:	Total		wt%

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

Analysis done by USGS OMR Branch of Analytical Chemistry, Lakewood, Colorado: J. Taggart, Ardith J. Bartel, K. Stewart

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_3_4_ # SapCa-1 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2b3b4b # SapCa-1.AcB # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns