Zoisite

Spectrum Details

Modality

FTIR

Category

mineral

Material Type

Sorosilicate

Sample ID

HS347.1B, HS347.2B, HS347.3B, HS347.4B, HS347.6

Collection Locality

Norway

Spectral Purity

1b2_3_4_ # HS347.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS347.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2b3c4c # HS347.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1b2_3_4_ # HS347.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1c2_3_4_ # HS347.6 # 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

"S-2 Zoisite 347--Norway. Ca2(AlOH)Al2-(SiO4)3. Zoisite, also a metamorphic mineral found in schists and gneisses, is orthorhombic and is dimorphous with clinozoisite. This sample displays extremely intense bands at 0.43, 0.53 and 0.8 µ, indicative of ferric iron possibly with contributions from Mn^+2. The major OH feature is most unusual, occurring at 1.68 µ, as opposed to the normal 1.4 µ position. There is also the unusual weak band at 1.85 µ, and the water feature at 1.9 µ with doubled features at 2.3 µ and 2.35 µ, and another band at 2.48 µ. These features are caused by combinations of OH with lattice or bending modes of ALOH, but the exact nature of these bands is not known." 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. Grain size fractions are indicated by the extension after the sample number: .1B = IMAGE_OF_SAMPLE:

XRD Analysis

Zoisite + medium amount quartz + small amount other(s); M: ~40% quartz, feldspar may be present

X Units

cm⁻¹

Y Units

Absorbance

Data Points

1,801