Muscovite

Spectrum Details

Modality

UV-Vis

Category

mineral

Material Type

Phyllosilicate

Sample ID

HS146.1B, HS146.3B, HS146.4B

Collection Locality

Fremont County, Colorado

Spectral Purity

1a2_3_4_ # HS146.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2a3a4a # HS146.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns SPECTRAL_PURITY: 1a2_3_4_ # HS146.4B # 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: None

Sample Description

"P-14 Muscovite 146B--Fremont Co., Colorado. K2Al4(Si6Al2O20)(OH,F)4: Muscovite is one of the most common micas, occurring in acidic rocks, granitic pegmatites, schists etc. It frequently contains small amounts of ferrous and ferric iron, magnesium, manganese, chromium, calcium, sodium, lithium, vanadium and titanium. This spectrum is essentially identical with that of muscovite 24B (see Part I, p. 294, spectrum S-12). The weak broad band near 0.9µ, the very weak sharp feature near 0.44µ and the fall off to the blue are due to a small amount of ferrous iron substituting for aluminum. The near infrared bands due to the hydroxyl ion are essentially identical with those in the lepidolite spectrum, and the explanation is the same." 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

Muscovite - pure. (Norma Vergo)

X Units

nm

Y Units

Cross-section

Data Points

601