Thenardite

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Sulfate

Sample ID

GDS146

Collection Locality

Saline Valley, California

Spectral Purity

1c2c3c4u # GDS146 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

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

Sample Description

Spectrum originally published in: Crowley, J.K., 1991, Visible and Near-Infrared (0.4 - 2.5µm) Reflectance Spectra of Playa Evaporite Minerals: Journal of Geophysical Research, vol 96, no.B10, p. 16,231-16,240. IMAGE_OF_SAMPLE:

XRD Analysis

40 kV - 30 mA, 6.5-9.5 keV File: tnrdt146.out, -.mdi References: JCPDS #37-1465, HS450.3B Found: Thenardite, weak to very weak unidentified reflections at 3.57, 2.00, and 1.78 Angstroms. Comment: Well-crystallized phase, but not as well crystallized (pattern not as sharp) as HS450.3B J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126