sekaninaite
Sekaninaite is the Iron-rich
end member of a
solid solution series with
Cordierite. Sekaninaite is very rare, and its primary locality is Dolní Bory, Moravia, Czech Republic. It is sometimes considered a variety of
Cordierite, but is recognized by the
IMA as an individual mineral species with a
chemical formula of (Fe
3+,Mg)
2Al
4Si
5O
18. Sekaninaite is named in honor of the Czech
mineralogist Josef Sekanina (1901-1986).