DYOS Tool

Natural Minerals Group

From the standards library of SPI Supplies and the C. M. Taylor Company

# AS5060-AB

Biotite

K(Mg,Fe)3AlSi3O10(OH)2
ElementWt % OxideWt %
H 0.40H2O 3.58
O 43.30
F 0.26F 0.26
Mg 11.67MgO 19.35
Al 8.10Al2O3 15.31
Si 17.82SiO2 38.12
K 8.33K2O 10.03
Ca 0.15CaO 0.21
Ti 1.00TiO2 1.67
Mn 0.09MnO 0.12
Fe 8.22FeO 10.58
Ba 0.20BaO 0.22
Sum 99.5 Sum 99.4
2mm cubes and prisms, 40 - 60 mesh epoxy encapsulated
5-II-A-6
Polished Biotite in T100-52 mount
Name Description SPI # Each
Biotite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS5060-AB $
Biotite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS5065-AB $

# AS1070-AB

Biotite

Alternate - either version of this item may be used in our Off-The-Shelf Standards

K(Mg,Fe)3AlSi3O10(OH)2
ElementWt % OxideWt %
H 0.46H2O 4.11
O 43.95
Mg 11.77MgO 19.52
Al 8.01Al2O3 15.13
Si 18.10SiO2 38.72
K 8.23K2O 9.91
Ca 0.07CaO 0.10
Ti 1.06TiO2 1.77
Mn 0.03MnO 0.04
Fe 8.33FeO 10.72
Sum100.0 Sum100.0
Biotite encapsulated in epoxy
Locality unknown
This is a reflected light micrograph of polished, carbon coated biotite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Biotite is a micaceous mineral which forms platy, often curved crystals. Here the crystals are seen sideways on, as wispy flakes which are quite large enough to position an electron beam. The name refers to the French mineralogist Biot.
Click here for a mineralogical account of everything you might want to know about Biotite.
Name Description SPI # Each
Biotite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1070-AB $
Biotite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1075-AB $
   
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