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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

TITLE: Ammonio-Jarosite SCF-NHJ DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: SCF-NHJ

MINERAL_TYPE: Sulfate

MINERAL: Ammoniojarosite (Alunite group)

FORMULA: (NH4)(Fe+3)3(SO4)2(OH)6

FORMULA_HTML: (NH4)Fe+33(SO4)2(OH)6

COLLECTION_LOCALITY: Unavailable

ORIGINAL_DONOR: Charlie Alpers, USGS

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

IMAGE_OF_SAMPLE:
Photo of sample

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 7.3-9.5 keV
File: amjarscf.out, -.mdi
References: JCPDS 26-1014; Huebner's reference patterns
Found : ammoniojarosite

Comment: strong pattern, sharp peaks, very well crystallized, excellent match to the JCPDS pattern. A very weak, probably significant reflection at 2.356A does not appear on the JCPDS card.

J.S. Huebner, J. Pickrell, T. Schaefer, written communication 1994

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2a3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns