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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(For further information on spectrsocopy, see: http://speclab.cr.usgs.gov)

TITLE: Analcime GDS1 Zeolite DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS1

MINERAL_TYPE: Tectosilicate

MINERAL: Analcime (Zeolite group)

FORMULA: NaAlSi2O6*H2O

FORMULA_HTML: NaAlSi2O6•H2O

COLLECTION_LOCALITY: Mount Saint Hilaire, Quebec

ORIGINAL_DONOR: Wards Scientific

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

The original sample description and vis-NIR spectrum was published in:

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., v.95, 12653-12680.

The sample appears to be mineralogically and spectrally pure.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

pure Analcime - by Norma Vero

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

None

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

avg. grain size = 120µm

Smaller analcime grains adhere to larger grains. Uneven fracture, lacks good cleavage, clear grains, twinning, isotropic , anomalously biaxial in some cases, all characteristic of analcime. G. Swayze

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment
LIB_SPECTRA: splib04a r 333 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 936 0.2-3.0µm 200 g.s.=


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