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(For further information on spectroscopy, 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 Scapolites: Implications for Martian Mineralogy. J. Geophys Res. v. 95, pp. 14481-14495.
The band centered at 0.6µm gives this sample a blue color. Sample apparently has prehnite as a trace contaminant.
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Scapolite + feldspar + analcime (Norma Vergo, USGS)
Marialite(Major), Meionite (Major), Phlogopite(minor),Microcline(Minor),Sanidine,Calcite,Albite,(traces), Sutley, April, 2005. Apparently samples has a prehnite as a trace contaminant.
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:
Sample probably contains prehnite which may contribute some strong spectral features. This phase may be hard to differentiate from scapolite with x-ray diffraction analysis. Apparently the main features in the 2.3 -2.45 micron region may be due to prehnite contamination.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1c2c3c4_ # 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.= |
| LIB_SPECTRA: | splib06a r 14082 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 14096 | g.s.= |