Alunite K-Na

Spectrum Details

Modality

NIR

Category

soil

Material Type

Intimate

Sample ID

CU91-217H

Collection Locality

Cuprite, Nevada USA

Spectral Purity

1b2b3_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

This sample contains two alunite phases from the western side of Alunite Hill in the western hydrothermal center at Cuprite. It was deposited by hot hydrothermal fluids that altered lower Cambrian Harkless Phyllite about 7 m.y. ago.

XRD Analysis

Natroalunite, quartz (analysis by Steve Sutley on CU91-217H1)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126