Biotite [ K(Mg,Fe)3AlSi3O10(OH,F)2 ]

Image of Biotite

Material properties

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Crystal symmetry Monoclinic, Point group 2/m, Space group C2/m (#12)
Tags Hydroxide , Subgroup, Aluminosilicate

Composition

Element Wt%
H 0.41
K 9.02
Mg 14.02
Fe 6.44
Al 6.22
Si 19.44
O 43.36
F 1.1
Total: 100.01

Specimens of Biotite

Name Owner Materials Image Spectra Techniques
Tista 2020 D4 Shaker CSIRO Albite, Allanite-(Ce), Amphibole, Andesine, Apatite, Augite, Biotite, Bytownite, Chlorite, Mg, Fe, Epidote, Garnet, Grossular, Ilmenite, Ilmenite, Mn, K feldspar, Kyanite, Monazite-(Ce), Muscovite, Oligoclase, Pyroxene, Quartz, Staurolite, Titanite, Titanohematite, Xenotime-(Y), Zircon, Zoisite 46 CL, EDS
Tista 2020 D4 Zircon conc CSIRO Albite, Apatite, Biotite, Florencite-(Ce), Ilmenite, K feldspar, Kyanite, Monazite-(Ce), Muscovite, Plagioclase, Quartz, Rutile, Scheelite, Titanite, Zircon, Zoisite 27 CL, EDS