Celestite

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Sulfate

Sample ID

HS251.1B, HS251.2B, HS251.3B, HS251.4B

Collection Locality

Mexico

Spectral Purity

1b2_3_4_ # Celestite HS251.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Celestite HS251.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4b # Celestite HS251.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # Celestite HS251.4B # 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

Sample originally described in: Hunt, G.R., Salisbury, J.W., and Lenhoff, C.J., 1971, Visible and Near-Infrared spectra of minerals and rocks: IV. Sulphide's and Sulphate's: Modern Geology, V. 3, p 1-14. Grain size fractions are indicated by the extension after the sample number: .1B = IMAGE_OF_SAMPLE:

XRD Analysis

40 kV - 30 mA, 6.5-9.5 keV Reference: JCPDS #5-593; Huebner's reference pattern. Found: Celestite. Sought but not found: quartz - the strong (100) reflection is not present. Comment: Reflections match the JCPDS card well. However, the reflections are broad rather than sharp, somewhat like my reference pattern (synthetic SrSO4)." J.S. Huebner, J. Pickrell, and T. Schaefer, 1994, written communication.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126