Sample Description USGS Spectral Library Version 7

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:
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web link}

TITLE: Phlogopite WS675 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: WS675

MINERAL_TYPE: Phyllosilicate

MINERAL: Phlogopite (Mica group)

FORMULA: KMg3Si3AlO10(F,OH)2

FORMULA_HTML: KMg₃Si₃AlO₁₀(F,OH)₂

COLLECTION_LOCALITY: Bancroft, Ontario, Canada

ORIGINAL_DONOR: Ward Science Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Forms series with Biotite.

IMAGE_OF_SAMPLE:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 7.0-9.5 keV
File: plogo675.out, -.mdi (edge = random mount)
References: Huebner's reference patterns, particularly of a phlogopite crystal from Burgess, Ontario; S. W. Bailey (1988, MSA Reviews 13)

Comment: Only moderately well crystallized (compare with WS-496). Position of the (3T 30-30) or (1M 060) reflection at 1.535 Angstroms consistent with phlogopite (Mg=100). Three unindexed reflections at 1.64, 1.61. and 1.58 Angstroms also appear in the reference pattern and in WS-496.

J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2c3b4_ # WS675 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns