Hypersthene

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Inosilicate

Sample ID

PYX02.a, PYX02.b, PYX02.c, PYX02.d, PYX02.e, PYX02.f, PYX02.g, PYX02.h

Collection Locality

Bamble, Norway

Spectral Purity

1c2c3b4b # Hypersthene PYX02.a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.c # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.d # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.e # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.f # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.g # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2c3b4b # Hypersthene PYX02.h # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

XRF

Sample Description

Intermediate member of the series Enstatite-Orthoferrosilite. The original sample description and vis-nir spectrum was published by: Singer, R.B., 1981, Near-Infrared spectral reflectance of mineral mixtures: Systematic combinations of pyroxenes, olivine, and iron oxides: J. Geophys Res., v. 86, p. 7967-7982. The sample is pure pyroxene except for a small (less than 2%?) amount of amphibole (possibly tremolite). The amphibole absorption features appear in the spectra as weak, narrow bands at 2.3 m and 1.4 m. Singer suspected the tremolite contamination and the amphibole features are in the higher resolution spectra in this library support that. The sample was ground and wet sieved in methanol at the USGS Denver Spectroscopy Laboratory by Roger Clark. SEM photos were done by R. Clark on each sieve interval to characterize the grain sizes. Grain size fractions are indicated by the extension after the sample number: .g = 5-10 microns .a = 10-20 microns .d = 20-30 microns .e = 30-45 microns .f = 45-104 microns .b = 104-150 microns .c = 150-250 microns .h = >250 microns IMAGE_OF_SAMPLE: NO PHOTO

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801