Jadeite

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Inosilicate

Sample ID

HS343.1B, HS343.2B, HS343.3B, HS343.4B, HS343.6

Collection Locality

California

Spectral Purity

1b2_3_4_ # Jadeite HS343.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Jadeite HS343.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2c3b4u # Jadeite HS343.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Jadeite HS343.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Jadeite HS343.6 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

None # XRF, EPMA, ICP(Trace), WChem COMPOSITION_TRACE: None

Sample Description

"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." 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. Grain size fractions are indicated by the extension after the sample number: .1B = IMAGE_OF_SAMPLE:

XRD Analysis

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.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801