Strontianite

Spectrum Details

Modality

NIR

Category

mineral

Material Type

Carbonate

Sample ID

HS272.1B, HS272.2B, HS272.3B, HS272.4B

Collection Locality

Germany

Spectral Purity

1b2_3_4_ # HS272.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS272.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3b4_ # HS272.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS272.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

# XRF, EPMA, ICP(Trace), WChem COMPOSITION_TRACE:

Sample Description

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 File: stron272.out, -.mdi References: JCPDS #5-418 Found: Strontianite solid solution Comment: Very intense pattern of well-crystallized phase. The JCPDS pattern is of synthetic SrCO3. All reflections of HS272 lie at higher 2 theta values (smaller interplanar spacings) than the endmember reference pattern, indicating substitution of a cation (such as Ca) that has a smaller ionic radius than strontium. J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126