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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: Rectorite RAr-1 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: RAr-1

MINERAL_TYPE: Phyllosilicate

MINERAL: Rectorite

FORMULA: Al2Si4O10(OH)2 + (Mg,Fe+2,Al)3(Al,Si)4O10(OH)2*4H2O

FORMULA_HTML: Al2Si4O10(OH)2 + (Mg,Fe+2,Al)3(Al,Si)4O10(OH)2•4H2O

COLLECTION_LOCALITY: Garland County, Arizona

ORIGINAL_DONOR: Grim Collection?

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Rectorite, a clay mineral, is a regular interstratification of a dioctahedral mica and a dioctahedral smectite.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Rectorite + chlorite + muscovite; < 2µm cut rectorite + trace chlorite + trace muscovite M: 10-15% quartz, 2% chlorite, 2% opaque, no HCl fizz (Norma Vergo)

END_XRD_ANALYSIS.

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


COMPOSITION
KEYWORD
Oxide
ASCII
Amount Weight
Percent, %
Oxide
html
COMPOSITION: SiO2 72.8 wt% SiO2
COMPOSITION: TiO2 0.31 wt% TiO2
COMPOSITION: Al2O3 16.9 wt% Al2O3
COMPOSITION: Fe2O3 1.22 wt% Fe2O3
COMPOSITION: FeO 0.38 wt% FeO
COMPOSITION: MnO less than 0.02 wt% MnO
COMPOSITION: MgO 0.26 wt% MgO
COMPOSITION: CaO 0.09 wt% CaO
COMPOSITION: Na2O 1.11 wt% Na2O
COMPOSITION: K2O 0.45 wt% K2O
COMPOSITION: P2O5 0.07 wt% P2O5
COMPOSITION: H2O+ 4.75 wt% H2O+
COMPOSITION: H2O- 1.49 wt% H2O-
COMPOSITION: H2O 6.24 wt% H2O
COMPOSITION: LOI 6.16 wt% LOI
COMPOSITION: Total wt%
COMPOSITION: O=Cl,F,S wt% #correction for Cl, F, S
COMPOSITION: New Total wt%

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

Analysts: E. Brandt, H. H. Christie

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1d2_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 4166 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 5878 0.2-3.0µm 200 g.s.=


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