DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: IL105
MINERAL_TYPE: Phyllosilicate
MINERAL: Illite, a group of hydrated mica-clay minerals
FORMULA: (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,H20]
FORMULA_HTML: (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,H2O]
COLLECTION_LOCALITY: Fithian, IL
ORIGINAL_DONOR: Phoebe Hauff/USGS Sedimentary Mineralogy Laboratory
CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
SAMPLE_DESCRIPTION:
IMAGE_OF_SAMPLE:
NO PHOTO
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Illite (1Md-illite)
Contaminant phases: Chlorite, dark quartz (?).
Kruse, F.A., and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUGS/UNESCO, Special Publication, 211 p., (in press).
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
average grain size= 10 µm
sample contains 5 vol% quartz. G. Swayze.
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns