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: Jarosite NMNH95074-1 (Na) DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: NMNH95074-1

MINERAL_TYPE: Sulfate

MINERAL: Jarosite (Natrojarosite) (Alunite group)

FORMULA: Na(Fe+3)3(SO4)2(OH)6

FORMULA_HTML: NaFe⁺³₃(SO₄)₂(OH)₆

COLLECTION_LOCALITY: Warner Mine, Hot Springs, Mineral County, Nevada

ORIGINAL_DONOR: National Museum of Natural History

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Fe⁺³ analogue of alunite. Secondary mineral found as crusts and coatings on ferruginous ores.

IMAGE_OF_SAMPLE:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Natrojarosite (NaFe₃(SO₄)₂(OH)₆) + quartz (m).
Spectrally pure. (Norma Vergo)

END_XRD_ANALYSIS.

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

COMPOSITION_DISCUSSION:

None

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Not done yet

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3b4_ # 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 2487	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib05a r 3772	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib06a r 11574			g.s.=
LIB_SPECTRA:	splib06a r 11586			g.s.=