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DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: Sodium sulfate, anhydrous, J.T. Baker 1-3898
MATERIAL_TYPE: Chemical Reagent
MATERIAL: Sodium sulfate, anhydrous, powder
FORMULA: Na2SO4
FORMULA_HTML: Na2SO4
COLLECTION_LOCALITY: Purchased from J.T. Baker
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:
CURRENT_SAMPLE_LOCATION: USGS Spectroscopy Lab, Denver, CO
ULTIMATE_SAMPLE_LOCATION:USGS Spectroscpy Lab, Denver, CO
SAMPLE_DESCRIPTION: Powder
Other Names: Disodium sulfate, Thenardite
CAS #: 7757-82-6
J.T. Baker Product #: 3898-01
J.T. Baker Lot #: 501553
J.T. Baker Analysis
Assay (Na2SO4): 99.1%
Insoluble Matter: 0.005%
Loss on ignition: 0.4%
pH of 5% solution at 25 oC: 6.8
Chloride (Cl): 0.001%
Phosphate (PO4): 0.002%
Calcium, Magnesium, R2O3 precipitate: 0.005%
Potassium (K) (by FES): 0.001%
Trace impurities: Nitrogen compounds (as N) 2 ppm, Arsenic (As) <0.5 ppm, Heavy metals (as Pb) 4 ppm, Iron (Fe) 3 ppm
IMAGE_OF_SAMPLE: Not Available
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: Analysis done by Sigma Aldrich, The Certificate of Analysis can be found on the Sigma Aldrich Website using the Product and Lot Numbers.
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION: The presence of weak absorptions at 2.23, 2.31, and 2.39 microns suggests the presence of trace amounts of a hydroxyl-bearing contaminant.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1c2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns