Formula: (Mg,Fe)SiO3
Origin of name: 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
Crystal system: Hexagonal
Crystal class: -3
Twinning:
Unit cell: a = 4.78 Å, b = 4.78 Å, c = 13.6 Å
Colour:
Diaphaneity:
Luster: Vitreous
Habit:
Hardness:
Specific gravity:
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments: found in shock-metamorphosed Tenham chondrite as microscopic small aggregates, too small to identify optically
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