(For further information on spectrsocopy, see:
TITLE: Jadeite HS343 DESCRIPT
MINERAL: Jadeite (Pyroxene group)
ORIGINAL_DONOR: Hunt and Salisbury Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
"I-9 Jadeite 343B-California. NaAlSi2O6: Jadeite is a comparatively rare pyroxene of metamorphic origin, which is one source of gem quality jade. Ferric iron commonly substitutes for aluminum, which yields the band near 0.8µ and the fall off to the blue. There are very weak ferrous ion features near 1.0µ, as well as weak water bands from fluid inclusions near 1.9 and 2.25µ."
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.
40 kV - 30 mA, 6.5-9.5 keV
File: jadit343.out, -.mdi
Reference: Borg and Smith (1969)
Found: jadeite + analcite (trace)
Sought but not found: quartz, albite, calcite, aragonite
Comment: Strong, sharp reflections indicate high degree of crystallinity. The analcite identification is based on two distinct reflections (a third should be obscured by the jadite (-221)) and its common association with jadeite.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
Not done yet
SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
|LIB_SPECTRA:||splib04a r 2414||0.2-3.0µm||200||g.s.=|
|LIB_SPECTRA:||splib05a r 3614||0.2-3.0µm||200||g.s.=|
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