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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: Strontianite HS272 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS272

MINERAL_TYPE: Carbonate

MINERAL: Strontianite (Aragonite group)

FORMULA: SrCO3

FORMULA_HTML: SrCO3

COLLECTION_LOCALITY: Germany

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 6.5-9.5 keV
File: stron272.out, -.mdi
References: JCPDS #5-418
Found: Strontianite solid solution

Comment: Very intense pattern of well-crystallized phase. The JCPDS pattern is of synthetic SrCO3. All reflections of HS272 lie at higher 2 theta values (smaller interplanar spacings) than the endmember reference pattern, indicating substitution of a cation (such as Ca) that has a smaller ionic radius than strintium.

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 4645 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 6437 0.2-3.0µm 200 g.s.=


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