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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: Ulexite HS441 Boron, CA DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS441

MINERAL_TYPE: Hydrous Borate

MINERAL: Ulexite

FORMULA: NaCaB5O9*8H2O

FORMULA_HTML: NaCaB5O9•8H2O

COLLECTION_LOCALITY: California

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 [smear mount of ground sample is ulexite.out, bulk mount or random mount of unground sample is ulexite2.out]
References: JCPDS #12-419 (from Clark and Christ, 1959); Ghose et al. (1978)
Found: Ulexite

Comments: There are so many peaks that reflections of a second phase, if present could be obscured by overlap. Pattern ulexite2.out is extraordinary and was indexed successfully to about 35 degrees 2 theta using powder intensities calculated from the structure of Ghose et al. (1978). Reflections are very sharp, indicating a high degree of crystallinity and compositional heterogeneity.

J.S. Huebner and J. Pickrell, unpublished data, written communication, USGS, Reston, VA (1993)

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:

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 5064 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 6932 0.2-3.0µm 200 g.s.=


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