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 JR2501 (K) DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: JR2501

MINERAL_TYPE: Sulfate

MINERAL: Jarosite (Alunite group)

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

FORMULA_HTML: KFe⁺³₃(SO₄)₂(OH)₆

COLLECTION_LOCALITY: Gumma Iron Mine, Gumma Prefecture, Japan

ORIGINAL_DONOR: Colorado School of Mines

CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

SAMPLE_DESCRIPTION:

IMAGE_OF_SAMPLE:
NO PHOTO

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Jarosite Contaminant phases: quartz(?), trace clay(?).

Kruse, F.A., and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUGS/UNESCO, Special Publication, 211 p., (in press).

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

average grain size= 5 µm

Sample may have 5 vol% quartz. G. Swayze.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

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:	splib04a r 2477	0.2-3.0µm	200	g.s.= 5 µm
LIB_SPECTRA:	splib05a r 3761	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib06a r 11562			g.s.=