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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Zoisite HS347 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: HS347
MINERAL_TYPE: Sorosilicate
MINERAL: Zoisite (Epidote group)
FORMULA: Ca2Al3(SiO4)3(OH)
FORMULA_HTML: Ca2Al3(SiO4)3(OH)
COLLECTION_LOCALITY: Norway
ORIGINAL_DONOR: Hunt and Salisbury Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
"S-2 Zoisite 347--Norway. Ca2(AlOH)Al2-(SiO4)3. Zoisite, also a metamorphic mineral found in schists and gneisses, is orthorhombic and is dimorphous with clinozoisite. This sample displays extremely intense bands at 0.43, 0.53 and 0.8 µ, indicative of ferric iron possibly with contributions from Mn+2. The major OH feature is most unusual, occurring at 1.68 µ, as opposed to the normal 1.4 µ position. There is also the unusual weak band at 1.85 µ, and the water feature at 1.9 µ with doubled features at 2.3 µ and 2.35 µ, and another band at 2.48 µ. These features are caused by combinations of OH with lattice or bending modes of ALOH, but the exact nature of these bands is not known."
Sieve interval 74 - 250µm.
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.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Zoisite + medium amount quartz + small amount other(s);
M: ~40% quartz, feldspar may be present
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2_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 5202 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 7061 | 0.2-3.0µm | 200 | g.s.= |
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