DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS20 (NMNH124158)
MINERAL_TYPE: Phyllosilicate
MINERAL: Phlogopite (Mica group)
FORMULA: KMg3Si3AlO10(F,OH)2
FORMULA_HTML: KMg3Si3AlO10(F,OH)2
COLLECTION_LOCALITY: Burgess, Ontario (Cp sample)
ORIGINAL_DONOR: Bruce Hemingway
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Form series with Biotite.
Sieve interval: coarse
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
"Unit cell parameters are: a = 0.531+/-0.002 nm, b = 0.922+/-0.003 nm, c = 1.022+/-0.003 nm, and beta = 100.00+/-0.03°, and the structure type is 1M (M.R. Ross, U.S. Geol. Survey, personal communication, 1982) determined by single crystal methods."
Robie, R.A. and Hemingway, B.S., 1984, Heat capacites and entropies of phlogopite (KMg3[AlSi3O10](OH)2) and paragonite (NaAl2[AlSi3O10](OH)2) between 5 and 900 K and estimates of the enthalpies and Gibbs free energies of formation. American Mineralogist, v. 69, pp.858-868.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION: | SiO2 | 40.3 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 1.32 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 14.3 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | .63 | wt% | Fe2O3 |
| COMPOSITION: | FeO | 1.11 | wt% | FeO |
| COMPOSITION: | MnO | .03 | wt% | MnO |
| COMPOSITION: | MgO | 26.4 | wt% | MgO |
| COMPOSITION: | BaO | .16 | wt% | BaO |
| COMPOSITION: | CaO | <.07 | wt% | CaO |
| COMPOSITION: | Na2O | .43 | wt% | Na2O |
| COMPOSITION: | K2O | 10.1 | wt% | K2O |
| COMPOSITION: | F | 3.2 | wt% | F |
| COMPOSITION: | H2O+ | 2.63 | wt% | H2O+ |
| COMPOSITION: | H2O- | .91 | wt% | H2O- |
| COMPOSITION: | Total | 101.59 | wt% | |
| COMPOSITION: | O=Cl,F,S | 1.34 | wt% | #correction for Cl, F, S |
| COMPOSITION: | New Total | 100.25 | wt% |
Rapid rock analysis from:
Robie, R.A. and Hemingway, B.S., 1984, Heat capacites and entropies of phlogopite (KMg3[AlSi3O10](OH)2) and paragonite (NaAl2[AlSi3O10](OH)2) between 5 and 900 K and estimates of the enthalpies and Gibbs free energies of formation. American Mineralogist, v. 69, pp.858-868.
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1_2_3_4_
LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment
LIB_SPECTRA: splib04a r 3862 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=
LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=