Mineral Information and Data:

Akimotoite
MgSiO3 [CNMNC approved formula]

Named after Syun-iti Akimoto (1925-), of the Institute of Geophysics and Solid State Physics, University of Tokyo, specialist in high-pressure research, especially on phase relationships in the system (Mg,Fe)2 SiO4 at mantle conditions.

IMA status : Approved Species 1997 (IMA1997-044)
CLASSIFICATION 
Dana
(8th edition) :
04.03.05.07  
  (04) Simple Oxides
  (04.03) with a cation charge of 3+ (A+++2 O3)
  (04.03.05) Ilmenite Group
  
Nickel-Strunz
(10th edition) :
09.DA.05
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DA) with 2-periodic single chains, Si2O6; pyroxene family
  
Crystal system: Trigonal System
Point group (H-M): 3 — rhombohedral
Unit cell: a = 4.78 Å, b = 4.78 Å, c = 13.6 Å
  
Color: Colorless
Diaphaneity: Transparent
Luster: Vitreous
Hardness (Mohs): No data
Measured Density: No data g/cm3
Tenacity: No data
  
  

 

Akimotoite
Electron micrograph of akimotoite (Ak) as columnar grains.
Aggregates of akimotoite are adjacent to a large clinoenstatite grain (Cen) with (100) twin lamallae. (AmMin 84:268).
Origin : Shock-metamorphosed Tenham chondrite.
Photo: © American Mineralogist

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