DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: SJ-1

MINERAL_TYPE: Sulfate

MINERAL: Jarosite (Alunite group)

FORMULA: (K,H3O)(Fe+3)3(SO4)2(OH)6

FORMULA_HTML: (K,H₃O)Fe⁺³₃(SO₄)₂(OH)₆

COLLECTION_LOCALITY: Synthetic, Charlie Alpers, USGS

ORIGINAL_DONOR: Charlie Alpers

CURRENT_SAMPLE_LOCATION:

ULTIMATE_SAMPLE_LOCATION:

SAMPLE_DESCRIPTION:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

SJ-1 H3O-(10-20%) Jarosite, Box #1, 45 kV - 35 mA, 7.4-9.5 keV
SJ-1 H3O-(10-20%) Jarosite, Box #3, 40 kV - 30 mA, 7.3-9.5 keV
Reference: JCPDS #31-650 (hydronium jarosite)
Found: member of alunite group, spacings match hydronium jarosite

Comment: Good correspondence with the JCPDS data for synthetic hydronium jarosite and the brownish color suggest this alunite is iron- and hydronium-rich. The two samples appear to duplicate each other. Both patterns show a very very weak peak at 2.38 angstroms. Sharp peaks indicate good crystallinity."

J.S. Huebner, J. Pickrell, and J. Randow, 1993, written communication.

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

Sample contains 10-20% hydronium ion.

Charlie Alpers, personal communication.

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 2508 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.=