DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS613.a, GDS613.b
MINERAL_TYPE: Phyllosilicate
MINERAL: Prehnite
FORMULA: Ca2Al2Si3O10(OH)2
FORMULA_HTML: Ca2Al2Si3O10(OH)2
COLLECTION_LOCALITY: Australia
COLLECTION_LATITUDE: Not Available # degrees and decimal minutes (N or S)
COLLECTION_LONGITUDE: Not Available # degrees and decimal minutes (W or E)
DATUM: Not Available # coordinate datum
ORIGINAL_DONOR: Roger Clark, USGS Denver
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Tumbled polished prehnite sample. Large rocks were ground to make grain size fractions.
Grain size fractions are indicated by the extension after the sample number:
.a = <60µm
.b = >60µm
IMAGE_OF_SAMPLE: Not Available
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Pure prehnite.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
No additional compositional details available.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
Spectrum looks spectrally pure.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2a3a4_ #GDS613.a # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1a2a3a4_ #GDS613.b # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns