Illite GDS4 Marblehead

Spectrum Details

Modality

UV-Vis

Category

mineral

Material Type

Phyllosilicate

Sample ID

GDS4, GDS4.2

Collection Locality

Marble Head, WS

Spectral Purity

1b2b3b4_ # Illite GDS4 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Illite GDS4.2 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

XRF # 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 the sample was darker than normal due to carbonaceous impurities, but was otherwise spectrally pure. Sample GDS4.2 was ground to a finer grain size. IMAGE_OF_SAMPLE:

XRD Analysis

Analysis by Norma Vergo indicates that the sample is illite/smectite: 80% illite layers, R3 ordered, with trace amounts of feldspar. The less than 2µm separate is illite + illite/smectite.

X Units

nm

Y Units

Cross-section

Data Points

601