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J.S. Huebner and J. Pickrell, unpublished data, written communication, USGS, Reston, VA (1993)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_DISCUSSION:
None
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
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 5064 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=