DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: WS522

MINERAL_TYPE: Nesosilicate

MINERAL: Zircon

FORMULA: ZrSiO4

FORMULA_HTML: ZrSiO₄

COLLECTION_LOCALITY: Gurpui, Goias, Brazil

ORIGINAL_DONOR: Ward Scientific

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

<250 µ grain size.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS

40 kV - 30 mA, 6.5-9.5 keV
File: zircn522.out, -.mdi
Reference: Borg and Smith (1969).
Found: zircon, trace quartz?

Comment: Zircon very well crystallized. An very weak but distinct reflection that is not indexable as ziron lies in the position of the strong quartz (100). The strongest quartz reflection (101) lies at the position of the strong zircon (200) and thus could not be seen, if present.

J.S. Huebner, J. Pickrell, T. Schaefer, written communication 1994

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

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 5191 0.2-3.0µm 200 g.s.=

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

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