DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: HS272.1B, HS272.2B, HS272.3B, HS272.4B
MINERAL_TYPE: Carbonate
MINERAL: Strontianite (Aragonite group)
FORMULA: SrCO3
FORMULA_HTML: SrCO3
COLLECTION_LOCALITY: Germany
ORIGINAL_DONOR: Hunt and Salisbury Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Grain size fractions are indicated by the extension after the sample number:
.1B = <5 µm
.2B = <74 µm
.3B = 74-250 µm
.4B = 250-1200 µm
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 6.5-9.5 keV
File: stron272.out, -.mdi
References: JCPDS #5-418
Found: Strontianite solid solution
Comment: Very intense pattern of well-crystallized phase. The JCPDS
pattern is of synthetic SrCO3. All reflections of HS272 lie at
higher 2 theta values (smaller interplanar spacings) than the endmember
reference pattern, indicating substitution of a cation (such as Ca)
that has a smaller ionic radius than strontium.
J.S. Huebner, J. Pickrell, T. Schaefer, written communication(USGS)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2_3_4_ # HS272.1B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2_3_4_ # HS272.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2b3b4_ # HS272.3B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2_3_4_ # HS272.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns