Akimotoite

Ilmenite Group. A high-pressure phase and the Mg-analogue of hemleyite and the Si-analogue of geikielite.

History

Activities related to discovery and approval of the group members

Structural context

Akimotoite
Crystal System trigonalCrystal Class rhombohedralSpace Group R-3
a4.72—4.78 (4.7428)
b4.72—4.78 (4.7428)
c13.5591—13.71 (13.623)
alpha90
beta90
gamma120
volume262.537—269 (265.5123)

Based on 3 measurements

Chemical context

Stoichiometric formulas

Akimotoite
mindat.org
  • Jan. 24, 2025MgSiO3May contain minor Fe2+ and Al.
  • March 13, 2023(Mg,Fe2+)SiO3May contain minor Al.
IMA
  • March 13, 2023MgSiO3
mineralogy.rocks
  • Aug. 30, 2022(Mg,Fe2+)SiO3

Elements recorded on EPMA

2
Mg
2
O
2
Si
1
Al
1
Ca
1
Cr
1
Fe
1
Na

Physical properties

ColorColor entities, recognized using a custom trained NER model
  • colourless
Color noteOriginal color note from the source
Colourless
StreakStreak entities, recognized using a custom trained NER model
    Streak noteOriginal streak note from the source
    White
    Lustre
    Vitreous
    Calculated density
    4