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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 HS351 Scapolite DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS351

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:

This mineral occurs in metamorphosed limestone's around intrusive igneous rocks, and also in calcium-rich schists and gneisses. This sample displays weak water bands and a strong 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 Scapolites: Implications for Martian Mineralogy. J. Geophys Res. v. 95, pp. 14481-14495.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Scapolite + large amount other; M: ~2% pyrrhotite; slight HCl fizz. Spectrally pure: no calcite bands. (Norma Vergo)

Sample was subsequently purified with heavy liquid separation and "large amount other" was found to be plagioclase. Present spectrum was run on hand-picked grains. G. Swayze.

END_XRD_ANALYSIS.

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


COMPOSITION
KEYWORD
Oxide
ASCII
Amount Weight
Percent, %
Oxide
html
COMPOSITION: SiO2 48.55 wt% SiO2
COMPOSITION: TiO2 0.14 wt% TiO2
COMPOSITION: Al2O3 25.59 wt% Al2O3
COMPOSITION: FeO 0.0 wt% FeO
COMPOSITION: MnO 0.0 wt% MnO
COMPOSITION: MgO 0.05 wt% MgO
COMPOSITION: CaO 16.35 wt% CaO
COMPOSITION: Na2O 4.59 wt% Na2O
COMPOSITION: K2O 0.48 wt% K2O
COMPOSITION: Cl 0.09 wt% Cl
COMPOSITION: F 0.41 wt% F
COMPOSITION: SO3 1.89 wt% SO3
COMPOSITION: CO2 2.82 wt% CO2
COMPOSITION: Total 100.96 wt%
COMPOSITION: O=Cl,F,S 0.13 wt% #correction for Cl, F, S
COMPOSITION: New Total 100.82 wt%

COMPOSITION_TRACE: Exists but is not included.

COMPOSITION_DISCUSSION:

%Me= 65 End member: Mizzonite.
present spectrum was run on pure hand-picked grains. BS on end of catalogue no. indicates that this sample was hand-separated. G. Swayze.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Sample is scapolite that was handpicked for purity. G. Swayze.

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 3088 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 4461 0.2-3.0µm 200 g.s.=


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