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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

TITLE: Muscovite GDS108 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS108

MINERAL_TYPE: Phyllosilicate

MINERAL: Muscovite (Mica group)

FORMULA: KAl2Si3O10(OH)2

FORMULA_HTML: KAl2Si3O10(OH)2

COLLECTION_LOCALITY: Methulu, Ontario

ORIGINAL_DONOR: Jim Crowley, USGS Reston

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

IMAGE_OF_SAMPLE:
Photo of sample

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

"The unit-cell parameters for this muscovite, determined by Robert Fournier, U.S. Geological Survey, are a=5.203± 0.005 Angstroms, b=9.003± 0.01 Angstroms, c=20.031±0.001 Angstroms, beta=94.47°±0.17°, using fluorite, a=5.4626 Angstrom, as an internal standard."

Robie, R.A., Hemingway, B.S., and Wilson, W.H., 1976, The heat capacities of calorimetry conference copper and of muscovite KAl2(AlSi3)O10(OH)2, pyrophyllite Al2Si4O10(OH)2, and illite K3(Al7Mg)(Si14Al2)O40(OH)8 between 15 and 375 K and their standard entropies at 298.15K. U.S. Geological Survey Journal of Research, v. 4, no. 6, p.631-644.

END_XRD_ANALYSIS.

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

COMPOSITION
KEYWORD		 Oxide
ASCII		 Amount Weight
Percent, %		 Oxide
html
COMPOSITION: SiO2 44.0 wt% SiO2
COMPOSITION: TiO2 .13 wt% TiO2
COMPOSITION: Al2O3 35.0 wt% Al2O3
COMPOSITION: Fe2O3 2.2 wt% Fe2O3
COMPOSITION: FeO .26 wt% FeO
COMPOSITION: MnO .07 wt% MnO
COMPOSITION: MgO .57 wt% MgO
COMPOSITION: CaO .22 wt% CaO
COMPOSITION: Na2O .72 wt% Na2O
COMPOSITION: K2O 9.6 wt% K2O
COMPOSITION: P2O5 .01 wt% P2O5
COMPOSITION: F .29 wt% F
COMPOSITION: CO2 .01 wt% CO2
COMPOSITION: H2O+ 5.6 wt% H2O+
COMPOSITION: H2O- 2.0 wt% H2O-
COMPOSITION: Total 100.68 wt%

Rapid rock analysis from:

Robie, R.A., Hemingway, B.S., and Wilson, W.H., 1976, The heat capacities of calorimetry conference copper and of muscovite KAl2(AlSi3)O10(OH)2, pyrophyllite Al2Si4O10(OH)2, and illite K3(Al7Mg)(Si14Al2)O40(OH)8 between 15 and 375 K and their standard entropies at 298.15K. U.S. Geological Survey Journal of Research, v. 4, no. 6, p.631-644.

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum resembles a normal muscovite. G. Swayze

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3b4_ # GDS108 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns