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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: Buddingtonite NHB2301 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: NHB2301

MINERAL_TYPE: Tectosilicate

MINERAL: Buddingtonite (Feldspar group)

FORMULA: (NH4)AlSi3O8*0.5H2O

FORMULA_HTML: (NH4)AlSi3O8•½H2O

COLLECTION_LOCALITY: Sharon Heights #2, San Mateo, CA

ORIGINAL_DONOR: Richard C. Erd, USGS Menlo Park, CA

CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder

SAMPLE_DESCRIPTION:

IMAGE_OF_SAMPLE:
NO PHOTO

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Pure (?)

Kruse, F.A. and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUGS/UNESCO, Special Publication, 211p., (in press).

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

From composition analyses:
(NH4)2O = 8.34 wt%
other = .59 wt%

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

avg. gr sz = 8 µm

Purity of sample difficult to evaluate because of fine grain size. G. Swayze.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns