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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Stilbite GDS8 Zeolite DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS8
MINERAL_TYPE: Tectosilicate
MINERAL: Stilbite (Zeolite group)
FORMULA: NaCa2Al5Si13O36*14H2O
FORMULA_HTML: NaCa2Al5Si13O36•14H2O
COLLECTION_LOCALITY: Nasik, India
ORIGINAL_DONOR: Wards Scientific
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
The sample appears white and to be spectrally pure.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Primarily a zeolite of the heulandite group - best match is stellerite, but this isn't definitive
Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA.
Stilbite is also a member of the heulandite group.
40 kV - 30 mA, 6.5-9.5 keV
File: stilbite.out, -.mdi
References: JCPDS #24-894
Found: Stilbite
Comment: Very well crystallized phase. Expected to observe the (-201)
reflection, but did not. Did observe some unexpected peak splitting
not shown in the JCPDS listing. JCPDS listing does not exceed 35.8 degrees
2 theta for CuK alpha, so any additional phase having reflections only above
35.8 degrees could not be detected without further work. Stilbite has
fibrous habit; this material is granular.
J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: # 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: 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 4625 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6414 | 0.2-3.0µm | 200 | g.s.= |
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