Illite IMt-1.a

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

IMt-1.a, IMt-1.b

Collection Locality

Silver Hill, Montana

Spectral Purity

1b2b3b4_ # IMt-1.a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2a3a4_ # IMt-1.b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

EPMA # XRF, EPMA, ICP(Trace), WChem

Sample Description

A spectrum of this sample was published by: Clark, R.N., T.V.V. King, M. Klejwa, G. Swayze, and N. Vergo, 1990, High spectral resolution reflectance spectroscopy of minerals: J. Geophys Res. 12653-12680. who noted that it was spectrally pure. Samples measured for the library include bulk (a) and less than 2µm fraction (b). The spectrum from 2.5 to 25µm for this sample was published in: Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263. IMAGE_OF_SAMPLE:

XRD Analysis

Analysis by Norma Vergo indicates that the bulk sample is illite + quartz, less than 2µm separate is pure illite/smectite with 95% illite layers.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126