Cookeite CAr-1.c lt30um

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Phyllosilicate

Sample ID

CAr-1.a, CAr-1.b, CAr-1.c

Collection Locality

N. Little Rock, ARK

Spectral Purity

1b2b3b4_ # CAr-1.a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4_ # CAr-1.b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2c3c4_ # CAr-1.c # 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

Sample was ground in an alumina mortar and pestle and wet sieved with methanol into less than 30µm (c), 30-45µm, 60-104µm (b), and 104-150µm (a) size fractions. (Letter denotes spectrum designation.) King, T.V.V. and R.N. Clark, 1989, Spectral Characteristics of Chlorites and Mg-Serpentines Using high-Resolution Reflectance Spectroscopy. Jour. Geophys. Res., 13.997-14,008. IMAGE_OF_SAMPLE:

XRD Analysis

Sample is cookeite plus medium amount of calcite. The sample is spectrally pure. XRD analysis by Norma Vergo. 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.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126