(For further information on spectroscopy, see:
TITLE: Mizzonite HS351 Scapolite DESCRIPT
MINERAL: Mizzonite (Scapolite group)
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
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. Apparently the sample has a trace of prehnite.
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. Apparently some of these grains were prehnite.
Meionite(Major),Augite (major),calcite,quartz,microcline,weddellite,albite (traces). Sutley, April 2005.:wq XRD shows evidence for a trace of prehnite.
COMPOSITIONAL_ANALYSIS_TYPE: EM(WDS) # XRF, EM(WDS), ICP(Trace), WChem
|COMPOSITION:||O=Cl,F,S||0.13||wt%||#correction for Cl, F, S|
COMPOSITION_TRACE: Exists but is not included.
%Me= 65 End member: Mizzonite.
present spectrum was run on hand-picked grains, some of which were prehnite grains. BS on end of catalogue no. indicates that this sample was hand-separated. G. Swayze.
Sample still has some prehnite contamination.
Sample probably contains prehnite which does contribute some strong spectral features between 2.3 and 2.45 microns. This phase may be hard to differentiate from scapolite with x-ray diffraction analysis.
SPECTRAL_PURITY: 1c2c3d4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
|LIB_SPECTRA:||splib04a r 3088||0.2-3.0µm||200||g.s.=|
|LIB_SPECTRA:||splib05a r 4461||0.2-3.0µm||200||g.s.=|
|LIB_SPECTRA:||splib06a r 14141||g.s.=|
|LIB_SPECTRA:||splib06a r 14155||g.s.=|