Clark and others 2007 USGS Data Series 231
Spectral Library splib06a Sample Description

(For further information on spectroscopy, see: http://speclab.cr.usgs.gov)

TITLE: Syngenite GDS139 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS139

MINERAL_TYPE: Sulfate

MINERAL: Syngenite

FORMULA: K2Ca(SO4)2*H2O

FORMULA_HTML: K₂Ca(SO₄)₂•H₂O

COLLECTION_LOCALITY: X-rayed (Synthetic)

ORIGINAL_DONOR: Jim Crowley

CURRENT_SAMPLE_LOCATION: USGS Reston, Virginia

ULTIMATE_SAMPLE_LOCATION: USGS Reston, Virginia

SAMPLE_DESCRIPTION:

evaporation of K₂SO₄ + CaSO₄ solution at room temperature

Hydrous sulfate Spectrum originally published in: Crowley, J.K., 1991, Visible and Near-Infrared (0.4 - 2.5µm) Reflectance Spectra of Playa Evaporite Minerals: Journal of Geophysical Research, vol 96, no.B10, p. 16,231-16,240.

IMAGE_OF_SAMPLE:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Pure syngenite. (Crowley, 1991)

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

evaporation of K₂SO₄ + CaSO₄ solution at room temperature

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2a3a4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

LIB_SPECTRA_HED:	where	Wave Range	Av_Rs_Pwr	Comment
LIB_SPECTRA:	splib04a r 4665	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib05a r 6460	0.2-3.0µm	200	g.s.=
LIB_SPECTRA:	splib06a r 21444			g.s.=
LIB_SPECTRA:	splib06a r 21456			g.s.=