Clark and others 2007 USGS Data Series 231
Spectral Library splib06a Sample Description

(For further information on spectroscopy, see: http://speclab.cr.usgs.gov)

TITLE: Schwertmannite BZ93-1 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: BZ93-1

MINERAL_TYPE: Sulfate

MINERAL: Schwertmannite

FORMULA: Fe16O16(OH)12(SO4)2

FORMULA_HTML: Fe₁₆O₁₆(OH)₁₂(SO₄)₂

COLLECTION_LOCALITY: Deposits on banks and rocks downstream from alteration zones.

ORIGINAL_DONOR: Kathy Smith

CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.

ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.

SAMPLE_DESCRIPTION:

Schwertmannite?? (poorly crystalline Fe3+ bearing mineral)

IMAGE_OF_SAMPLE:
NO PHOTO

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Schwertmannite possible near detection limit, otherwise only quartz(trace). lab spectroscopy: amorphous Fe3+ bearing minerals.

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF, EM(WDS), ICP(Trace),WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum resembles that of synthetic and natural schwertmannite samples.

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:	splib05a r 6111	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib06a r 20097			g.s.=