Feklichevite
Feklichevite is a rare mineral of the eudialyte group with the formula Na11Ca9(Fe3+,Fe2+)2Zr3NbSi(Si3O9)2(Si9O27)2. The original formula was extended to show the presence of cyclic silicate groups and presence of silicon at the M4 site, according to the nomenclature of eudialyte group. When compared to other minerals of the group, feklichevite characterizes in 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 and is also present at the M1 site. Other iron-bearing minerals of the group are eudialyte, ferrokentbrooksite, georgbarsanovite, khomyakovite, labyrinthite, oneillite and rastsvetaevite, but they rather contain ferrous iron Feklichevite name honors Russian mineralogist and c
primaryTopic
Feklichevite
Feklichevite is a rare mineral of the eudialyte group with the formula Na11Ca9(Fe3+,Fe2+)2Zr3NbSi(Si3O9)2(Si9O27)2. The original formula was extended to show the presence of cyclic silicate groups and presence of silicon at the M4 site, according to the nomenclature of eudialyte group. When compared to other minerals of the group, feklichevite characterizes in 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 and is also present at the M1 site. Other iron-bearing minerals of the group are eudialyte, ferrokentbrooksite, georgbarsanovite, khomyakovite, labyrinthite, oneillite and rastsvetaevite, but they rather contain ferrous iron Feklichevite name honors Russian mineralogist and c
has abstract
Feklichevite is a rare mineral ...... tallographer, V. G. Feklichev.
@en
La feklichevite è un minerale appartenente al gruppo dell'eudialite.
@it
Wikipage page ID
49,594,462
Wikipage revision ID
736,535,353
category
cleavage
color
dana
density
diaphaneity
Transparent or Translucent
fluorescence
formula
Na11Ca92Zr3Nb[Si25O73]5
habit
isometric, thick-tabular; grains
impurities
luster
mohs
opticalprop
pleochroism
refractive
nω=1.61, nε=1.61
streak
symmetry
system
Ditrigonal pyramidal class
tenacity
unit cell
a = 14.26, c = 30.17 [Å] ; Z = 3
subject
comment
Feklichevite is a rare mineral ...... ors Russian mineralogist and c
@en
La feklichevite è un minerale appartenente al gruppo dell'eudialite.
@it
label
Feklichevite
@en
Feklichevite
@it
wasDerivedFrom
isPrimaryTopicOf
name
Feklichevite
@en