Found in fragments within veins of shock-induced melt. A member of the Ilmenite group. Dimorphic relationship with enstatite and clinoenstatite.
IMA Status:
Approved IMA 1998 (Dana # Added)
Locality:
Tenham chondritic meteorite, which fell in 1879 in South Gregory, Queensland, Australia. Link to MinDat.org Location Data.
Name Origin:
Named after Syun-iti Akimoto (b. 1925), of the Institute of Geophysics and Solid State Physics, University of Tokyo, specialist in high-pressure research, especially on phase relati onships in the system (Mg,Fe)2 SiO4 at
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Horiuchi H , Hirano M , Ito E , Matsui Y , American Mineralogist , 67 (1982) p.788-793, MgSiO3 (ilmenite-type): Single crystal X-ray diffraction study
Physical Properties of Akimotoite
Color:
Colorless.
Diaphaneity:
Transparent
Luster:
Vitreous (Glassy)
Optical Properties of Akimotoite
Optical Data:
NCalc= 1.54 - from Gladstone-Dale relationship (KC = 0.2024) where Ncalc=Dcalc*KC+1
Calculated Properties of Akimotoite
Electron Density:
Bulk Density (Electron Density)=2.64 gm/cc note: Specific Gravity of Akimotoite =2.67 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PEAkimotoite = 5.17 barns/electron U=PEAkimotoite x rElectron Density= 13.64 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Akimotoite is Not Radioactive