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: Saponite SapCa-1 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: Ca-1

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.

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, EM(WDS), 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_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_ # 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 4339 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib04a r 4350 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 6077 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 6090 0.2-3.0µm 200 g.s.=


USA.gov logo  Take Pride in America button