TITLE: Kaolinite GDS11 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS11

MINERAL_TYPE: Phyllosilicate

MINERAL: Kaolinite (Kaolinite-Serpentine group)

FORMULA: Al2Si2O5(OH)4

FORMULA_HTML: Al2Si2O5(OH)4

COLLECTION_LOCALITY: unknown

ORIGINAL_DONOR: Wards Natural Science

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

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 < 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.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Kaolinite + anatase (Norma Vergo, USGS)

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 2574 0.2-3.0µm 200 g.s.=0.001 cm

LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=