- Modality
- NIR
- Category
- mineral
- Material Type
- Sulfate
- Sample ID
- AL706
- Collection Locality
- Sulfur, Nevada
- Spectral Purity
- 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
- Composition / XRD
- None # XRF, EPMA, ICP(Trace), WChem
- Sample Description
- Composition determined to be natroalunite (Na=100) endmember based on position of the 1.496 micron OH overtone absorption using Swayze and other (2014) wavelength correlation method. See: Swayze, G.A., Clark, R.N., Goetz, A.F.H., Livo, K.E., Breit, G.N., Kruse, F.A., Sutly, S.J., Snee, L.W., Lowers, H.A., Post, J.L., Stoffregen, R.E., and Ashley, R.P., 2014, Mapping advanced argillic alteration at Cuprite, Nevada, using imaging spectroscopy: Economic Geology, v. 109, p. 1179-1221. IMAGE_OF_SAMPLE: NO PHOTO
- XRD Analysis
- Alunite Contaminant phases: smectite, quartz, minor amounts. Kruse, F.A., and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUSG/UNESCO, Special Publication, 211p., (in press).
- X Units
- cm⁻¹
- Y Units
- Absorbance
- Data Points
- 2,126