Murataite-(Y)

Polysomatic pyrochlore-murataite series with modular structure and four structural varieties of murataite (3C, 5C, 7C, and 8C) are described by Laverov et al. (2011). The structure is a derivative of that of fluorite. The synthetic 8C polytype is a candidate for long-term immobilization of high-level nuclear waste. Its octahedral framework is modular, consisting of alternate murataite and pyrochlore modules to form a transitional substructure combining parts of the struture of the 3C polytype and pyrochlore.

History

Activities related to discovery and approval of the group members

Structural context

Murataite-(Y)
Crystal System isometricCrystal Class hexoctahedralSpace Group Fm-3m
a14.886
b14.886
c14.886
alpha90
beta90
gamma90
volume3298.63

Based on 1 measurements

Chemical context

Stoichiometric formulas

Murataite-(Y)
mindat.org
  • March 13, 2023(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4
IMA
  • March 13, 2023(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4
mineralogy.rocks
  • Aug. 30, 2022(Y,Na)6Zn(Zn,Fe3+)4(Ti4+,Nb5+,Na)12O29(O,F,OH)10F4

Elements recorded on EPMA

1
Ca
1
Dy
1
Er
1
F
1
Fe
1
Ho
1
Lu
1
Mn
1
Na
1
Nb
1
O
1
Si
1
Ti
1
Tm
1
Y
1
Yb
1
Zn

Physical properties

ColorColor entities, recognized using a custom trained NER model
    Color noteOriginal color note from the source
    Black
    StreakStreak entities, recognized using a custom trained NER model
    • dark brown
    Streak noteOriginal streak note from the source
    Dark brown
    Lustre
    Sub-Metallic
    Fracture
    Conchoidal
    Transparency
    Opaque
    Tenacity
    brittle
    Hardness
    6—6.5
    Calculated density
    4.64