TITLE: Gypsum SU2202 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: SU2202

MINERAL_TYPE: Sulfosalt

MINERAL: Gypsum

FORMULA: CaSO4*2H2O

FORMULA_HTML: CaSO4•2H2O

COLLECTION_LOCALITY: unknown

ORIGINAL_DONOR: Ward Natural Science Collection

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, 211 p., (in press).

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Bimodal gr sz distribution:
mode 1 225 µm @ 35 vol%
mode 2 13 µm @ 65 vol%

avg gr sz = 133 µm

Smaller grains coat 90% of larger grain surfaces. Very soft, well developed cleavage, biaxial, no contaminants. 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 1889 0.2-3.0µm 200 g.s.= 133 µm

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

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