Kaolinite

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

GDS11

Collection Locality

unknown

Spectral Purity

1b2b3b4_ # 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:

Sample Description

Polymorphous with Dickite, Halloysite and Nacrite. A spectrum for this sample was published by: Clark, R.N. and P.G. Lucey, 1984, Spectral Properties of Ice-Particulate Mixtures and Implications for Remote Sensing I: Intimate Mixtures: J. Geophys. Res., 6341-6348. Dry sieved to less than 63 µm. The mean grain size is 10-20 µm according to Clark and Lucey (1984), but is probably closer to 10 µm. From the visible-near-IR spectrum, the kaolinite appears spectrally pure. IMAGE_OF_SAMPLE:

XRD Analysis

Kaolinite + anatase (Norma Vergo, USGS)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126