-
Fengchengite is a rare
mineral of the
eudialyte group with the
formula Na12[ ]3(Ca,Sr)6Fe33+Zr3Si(Si25O73)(H2O,OH)3(OH,Cl)2. The
formula is simplified...
-
Feldspar (mineral group)
Feldspathoid (mineral group) Felsőbányaite
Fengchengite (eudialyte group)
Ferberite Fergusonite (mineral group)
Feroxyhyte Ferrierite...
- Fled
Fencooperite Fco
Ferrorhodonite Frdn Fluorokino****alite
Flkns Fengchengite Fcg Ferro-richterite Frct Fluoro-leakeite Fllk
Feodosiyite Fdy Ferrorockbridgeite...
-
calcium at two main
sites instead of one site.
Together with feklichevite,
fengchengite,
ikranite and
mogovidite it is a ferric-iron-dominant representative...
-
feature shared with
other eudialyte-group members,
including feklichevite,
fengchengite,
golyshevite and ikranite.
Similarly to golyshevite, it is calcium-dominant...
- the
presence of
ferric iron (thus
similar to ikranite,
mogovidite and
fengchengite) and
dominance of
calcium at the N4 site.
Calcium is
ordered in the structure...
- – Na11Ca9(Fe3+,Fe2+)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 (space
group R3m)
Fengchengite – Na12[ ]3(Ca,Sr)6Fe3+3Zr3Si(Si25O73)(H2O,OH)3(OH,Cl)2 (space
group R-3m)...
-
decaoxo tetrasilicate)
Fencooperite (IMA2000-023) 9.BH.20 [90] [91] [no]
Fengchengite (eudialyte: IMA2007-018a) 9.CO. [92] [no] [no]
Feodosiyite (IMA2015-063)...
