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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: Mizzonite HS350 Scapolite DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS350

MINERAL_TYPE: Tectosilicate

MINERAL: Mizzonite (Scapolite group)

FORMULA: Na4Al3Si9O24(Cl,OH)/Ca4Al6Si6O24(CO3,SO4)

FORMULA_HTML: Na4Al3Si9O24(Cl,O H)/Ca4Al6Si6O24(CO3, SO4)

COLLECTION_LOCALITY: Quebec, Canada

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

"T-17 Scapolite 350B--Quebec. (Na,Ca,K)4Al3-(Al,Si)3Si6O24(Cl,F,OH,CO3,SO4): This mineral occurs in metamorphosed limestone's around intrusive igneous rocks, and also in calcium-rich schists and gneisses. This sample displays a weak feature near 0.6µ similar to that in lazurite as well as water bands and a CO3 band near 2.35µ."

Hunt, G.R., J.W. Salisbury, and C.J. Lenhoff, 1973, Visible and near-infrared spectra of minerals and rocks: VI. Additional silicates. Modern Geology, v. 4, p. 85-106.

Sample description, NIR, MID-IR spectra and analysis published in:

Swayze,G.A., and R.N. Clark, 1990, Infrared Spectra and Crystal Chemistry of Sacpolites: Implications for Martian Mineralogy. J. Geophys Res. v. 95, pp. 14481-14495.

The band centered at 0.6µm gives this sample a blue color.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Scapolite + feldspar + analcime (Norma Vergo, USGS)
Heavy liquid separation of scapolite from contaminants after XRD analyses has proved successful. G. Swayze.

END_XRD_ANALYSIS.

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


COMPOSITION
KEYWORD
Oxide
ASCII
Amount Weight
Percent, %
Oxide
html
COMPOSITION: SiO2 50.39 wt% SiO2
COMPOSITION: TiO2 0.00 wt% TiO2
COMPOSITION: Al2O3 25.14 wt% Al2O3
COMPOSITION: FeO 0.02 wt% FeO
COMPOSITION: MnO 0.00 wt% MnO
COMPOSITION: MgO 0.00 wt% MgO
COMPOSITION: CaO 13.44 wt% CaO
COMPOSITION: Na2O 6.02 wt% Na2O
COMPOSITION: K2O 0.52 wt% K2O
COMPOSITION: Cl 1.09 wt% Cl
COMPOSITION: F 0.06 wt% F
COMPOSITION: SO3 1.45 wt% SO3
COMPOSITION: CO2 2.23 wt% CO2
COMPOSITION: Total 100.36 wt%
COMPOSITION: O=Cl,F,S 0.27 wt% #correction for Cl, F, S
COMPOSITION: New Total 100.09 wt%

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

%Me= 54 Sample: Mizzonite

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Pure scapolite after heavy liquid separation. The spectrum shown here is of the heavy liquid separate of scapolite. G. Swayze. It does not contain contaminants.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_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 3076 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 4448 0.2-3.0µm 200 g.s.=


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