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. 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:

av gr sz = 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: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 333 0.2-3.0µm 200 g.s.= 120 µm

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

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