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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: Jarosite GDS100 Na,Sy 90C DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS100

MINERAL_TYPE: Sulfate

MINERAL: Jarosite (Natrojarosite) (Synthetic) (Alunite group)

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

FORMULA_HTML: NaFe+33(SO4)2(OH)6

COLLECTION_LOCALITY: Synthetic

ORIGINAL_DONOR: Roger Stroffregen, SMU

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Sample synthesized at 90 C

IMAGE_OF_SAMPLE:
Photo of sample

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 7.3-6.5 keV
Reference: JCPDS #30-1203 (natrojorosite)
Found: natrojarosite

Comment: GDS100 is sharp, indicating good crystallinity. GDS is distinctly sharper, with better resolved peaks. Good correspondence with the JCPDS data. No additional reflections observed.

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

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2a3a4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns