F
Ferriphlogopite

An obsolete varietal term for ferrian phlogopite, tetra-ferriphlogopite.

Ferripyrophyllite

The ferric iron analogue of pyrophyllite.

Ferrisepiolite

A member of the palygorskite-sepiolite group with a composition of approximately (Fe3+,Fe2+,Mg)4 (Si,Fe3+)6O15(O,OH)2.6H2O.
See palygorskite-sepiolite group

Ferristilpnomelane

See stilpnomelane.

Ferrititanbiotite

An obsolete varietal term for biotite.

Ferriwodanite

An obsolete varietal term for biotite.

Ferriwotanite

An obsolete varietal term for biotite.

Ferro-aluminoceladonite

A dioctahedral member of the true mica group. The end-member formula is K Al(Fe2+,Mg)□Si4O10(OH)2. Typical range in composition is: viAl/(viAl + viFe3+) = 0.5 – 1.0, Mg/(Mg + viFe2+) ≤ 0.5 (Rieder et al., 1998). Li et al. (1997) described ferro- aluminoceladonite-1M from tuffs in the Murihiku Supergroup, Hokonui Hills, Southland, New Zealand.

Ferro-ferri-muscovite

An obsolete term for ferrian annite.

Ferro-phlogopite

An obsolete varietal term for ferroan phlogopite.