DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS323

MINERAL_TYPE: Phyllosilicate

MINERAL: Chrysotile (Kaolinite-Serpentine Group)

FORMULA: Mg3Si2O5(OH)4

FORMULA_HTML: Mg₃Si₂O₅(OH)₄

COLLECTION_LOCALITY: Arizona

ORIGINAL_DONOR: Smithsonian

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION:

SAMPLE_DESCRIPTION:

Chrysotile was not available in grain sizes greater than 200µm and was not sieved to grain sizes less than 200µm because of its carcinogenic character.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

This is a pure chrysotile. Sample 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.

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

Several attempts were made to chemically analyze this sample by XRF. However, sufficent quantities were not available to perform a reliable analysis.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Microscopically this is a pure chrysotile. Fibers avg. diameter is about 8 µm from optical observations. G. Swayze.

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 1042 0.2-2.7µm 200 g.s.= 8 µm

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

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