DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: NMNH105543
MINERAL_TYPE: Phyllosilicate
MINERAL: Lepidolite (Mica group)
FORMULA: K(Li,Al)3(Si,Al)4O10(F,OH)2
FORMULA_HTML: K(Li,Al)3(Si,Al)4O10(F,OH)2
COLLECTION_LOCALITY: Madagascar
ORIGINAL_DONOR: National Museum of Natural History
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Pink, lilac and gray mica.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Trioctahedral mica
Probably a mixture of several...best matches are taeniolite and
phlogopite, but not definitive
Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
None
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
Spectral comparison to lepidolite NMNH105538 shows extra spectral features that may be due to other phases.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1c2c3c4_ # NMNH105543 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns