Uralite

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Inosilicate

Sample ID

HS345.1B, HS345.2B, HS345.3B, HS345.4B, HS345.6

Collection Locality

Calumet, Colorado

Spectral Purity

1b2_3_4_ # HS345.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS345.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2c3c4u # HS345.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS345.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS345.6 # 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

I-15 Uralite 345B--Calumet, Colo. Ca2(Mg,Fe^2+)5(Si8O22)(OH,F)2: This is a hornblende formed by alteration of pyroxenes. It is generally actinolitic in composition, but often contains aluminum (Deer and others, 1963). Its spectrum shows a doubled iron feature near 0.75 and 1.0µ, the former due to Fe^3+ substituting for Al, the latter due to Fe^2+ substituting for Mg. The 1.4µ hydroxyl feature is considerably weaker than the 2.32µ and 2.38µ hydroxyl bands. The 1.9µ band indicates a slight amount of included water." Sieve interval 74 - 250µm. Hunt, G.R., J.W. Salisbury, and C.J. Lenhoff, 1973, Visible and near-infrared spectra of minerals and rocks: VI. Additional silicates. Modern Geology, v. 4, p. 85-106. IMAGE_OF_SAMPLE:

XRD Analysis

Amphibole - major (hornblende?) Clinopyroxene - major (augite?) Unidentifiable residual Note: Uralite is described as an amphibole psuedomorphous after pyroxene. Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801