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:

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, EM(WDS), 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: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 754 0.2-3.0µm 200 g.s.= 8 µm

LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=