Fersmite

Formula: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6

Mohs scale hardness: 4–4,5

Specific gravity: g/cm3

Rare earth elements: Ce

Rare earth content, %: REOmax=4,79 %

Other constituents, %: TiO2; Nb2O5; Ta2O5

Mineralklasse: Oxide, Niobates and Tantalates, MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM

Uses:

References

  1. https://en.wikipedia.org

  2. http://rruff.info/doclib/hom/fersmite.pdf

  3. http://www.mindat.org/min-1539.html

  4. https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Fersmite