Beryl

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Cyclosilicate

Sample ID

HS180.1B, HS180.2B, HS180.3B, HS180.4B, HS180.6

Collection Locality

Maine

Spectral Purity

1a2_3_4_ # HS180.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2_3_4_ # HS180.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2a3a4a # HS180.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2_3_4_ # HS180.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2_3_4_ # HS180.6 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

# XRF, EPMA, ICP(Trace), WChem

Sample Description

Theoretical percentages of the oxides in the formula are BeO 14.0%, Al2O3 19.0%, SiO2 67.0%. The presence of alkalis (Na and K) and Li may considerably reduce the percentage of BeO. Small and variable amounts of zeolithic H2O are present. Sieve interval 74-250µm. "Results of petrographic examination: Hand sample is pale green and appears pure. Microscopic examination shows that there is a small amount (2% or less) of very fine, low birefringent material in the sample. The grains occasionally have rhombic or cubic shape. These grains are unidentifiable." Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263. Grain size fractions are indicated by the extension after the sample number: .1B = IMAGE_OF_SAMPLE:

XRD Analysis

Pure (Norma Vergo). Pure beryl. Salisbury, J. W., Walter, L. W., and Vergo, N., 1987, Mid-Infrared (2.1-25µm) Spectra of Minerals: First Edition, U.S. Geological Survey Open File Report 87-263.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801