Tazzoliite

New structure type related to pyrochlore.

History

Activities related to discovery and approval of the group members

Structural context

Tazzoliite
Crystal System orthorhombicCrystal Class orthorhombic dipyramidalSpace Group Fmmm
a7.4105—7.4116 (7.4111)
b20.0632—20.0675 (20.0654)
c21.4402—21.4471 (21.4437)
alpha90
beta90
gamma90
volume3188.167—3189.4 (3188.7835)

Based on 2 measurements

Chemical context

Stoichiometric formulas

Tazzoliite
mindat.org
  • Dec. 17, 2023Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) (0≤x≤0,5)
  • March 13, 2023Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x)(0≤x≤0,5)
IMA
  • March 13, 2023Ba2CaSr0.5Na0.5Ti2Nb3SiO17[PO2(OH)2]0.5
mineralogy.rocks
  • Aug. 30, 2022Ba2CaSr0.5Na0.5Ti4+2Nb5+3SiO17[PO2(OH)2]0.5

Elements recorded on EPMA

2
Ba
2
Ca
2
H
2
Na
2
Nb
2
O
2
P
2
Si
2
Sr
2
Ti
1
F
1
Fe
1
S
1
Ta
1
V
1
Zr

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • pale orange
Color noteOriginal color note from the source
Pale orange
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Pearly
    Fracture
    Irregular/Uneven
    Transparency
    Transparent
    Tenacity
    brittle
    Calculated density
    4.489