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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: Natrolite NMNH83380 Zeolite DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: NMNH83380

MINERAL_TYPE: Tectosilicate

MINERAL: Natrolite (Zeolite group)

FORMULA: Na2Al2Si3O10*2H2O

FORMULA_HTML: Na2Al2Si3O10•2H2O

COLLECTION_LOCALITY: Nova Scotia, Canada

ORIGINAL_DONOR: Smithsonian

CURRENT_SAMPLE_LOCATION: USGS Reston, Virginia

ULTIMATE_SAMPLE_LOCATION: USGS Reston, Virginia

SAMPLE_DESCRIPTION:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 6.5-9.5 keV
File: natrolit.out, -.mdi
References: JCPDS #41-1355, Borg and Smith (1969) for natrolite
Found: Scolecite = natrolite; very weak reflections at 7.2, 3.55 angstroms

Comment: Natrolite and scolecite are well crystallized. Extra reflections could be a trace of sheet silicate with a basal spacing of 7 or 14 angstroms.

J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

None

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectral features are those of natrolite but deminished in strength by the presence of scolecite when compared to natrolite HS169.3B. G. Swayze

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_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 3428 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 4877 0.2-3.0µm 200 g.s.=


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