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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: Witherite HS273 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS273

MINERAL_TYPE: Carbonate

MINERAL: Witherite (Aragonite group)

FORMULA: BaCO3

FORMULA_HTML: BaCO3

COLLECTION_LOCALITY: England

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

C-10 Witherite. England (64, hand-ground). Witherite, BaCO3, is a comparatively rare mineral, usually found in hydrothermal veins associated with galena. Like strontianite, witherite is a member (and isostructure) of the aragonite group, and displays only carbonate bands. Witherite is normally fairly pure BaCO3, and this sample is no exception."

Hunt, G.R., J.W. Salisbury, 1971, Visible and near-infrared spectra of minerals and rocks: II. Carbonates. Modern Geology, v. 2, p. 23-30.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Pure witherite

Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA.

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # 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: 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 5159 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r 7025 0.2-3.0µm 200 g.s.=


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