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Akimotoite

Formula:
(Mg,Fe
2+
 
)SiO
 
3
System:TrigonalColour:colourless
Lustre:Vitreous
Name: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 relationships in the system (Mg,Fe)2 SiO4 at mantle conditions.


Ilmenite Group. The silicon analogue of Geikielite.

Classification of Akimotoite

IMA status:Approved 1997
Strunz 8th edition ID:4/C.05-05
Nickel-Strunz 10th (pending) edition ID:9.DA.05

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
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Type Occurrence of Akimotoite

Type Locality:Tenham meteorite, Tenham Station, South Gregory, Queensland, Australia

Physical Properties of Akimotoite

Lustre:Vitreous
Colour:colourless
Streak:white

Crystallography of Akimotoite

Crystal System:Trigonal

Chemical Properties of Akimotoite

Formula:
(Mg,Fe
2+
 
)SiO
 
3
Essential elements:Mg, O, Si
All elements listed in formula:Fe, Mg, O, Si

Relationship of Akimotoite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.DA.05Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
9.DA.05Enstatite
Mg
 
2
[SiO
 
3
]
 
2
9.DA.05Ferrosilite
Fe
 
2
[SiO
 
3
]
 
2
9.DA.10Clinoenstatite
Mg
 
2
[Si
 
2
O
 
6
]
9.DA.10Clinoferrosilite
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
9.DA.10Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DA.10Pigeonite
(Mg,Fe
2+
 
,Ca)(Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Augite
(Ca,Na)(Mg,Fe
2+
 
,Al,Fe
3+
 
,Ti)[(Si,Al)
 
2
O
 
6
]
9.DA.15Diopside
CaMg[Si
 
2
O
 
6
]
9.DA.15Esseneite
CaFe
3+
 
[AlSiO
 
6
]
9.DA.15Hedenbergite
CaFe
2+
 
[Si
 
2
O
 
6
]
9.DA.15Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
9.DA.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.20Aegirine-augite
(Na,Ca)(Fe,Fe,Mg,Al)Si
 
2
O
 
6
9.DA.20Omphacite
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
9.DA.25Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
9.DA.25Jadeite
Na(Al,Fe
3+
 
)[Si
 
2
O
 
6
]
9.DA.25Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.25Kosmochlor
NaCr[Si
 
2
O
 
6
]
9.DA.25Namansilite
NaMn
3+
 
[Si
 
2
O
 
6
]
9.DA.25Natalyite
Na(V
3+
 
,Cr)[Si
 
2
O
 
6
]
9.DA.30Spodumene
LiAl[Si
 
2
O
 
6
]

Other Names for Akimotoite

Synonyms:
IMA1997-044
German names:
Akimotoit
Russian names:
Акимотоит
Spanish names:
Akimotoita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Akimotoite

Reference List:Tomioka, N. and Fujino, K. (1999) Akimotoite, (Mg,Fe)SiO3, a new silicate mineral of the ilmenite group in the Tenham chondrite. American Mineralogist: 84: 267-271.

Miyajima, N., El Goresy, A., Dupas-Bruzek, C., Seifert, F., Rubie, D.C., Chen, M., Xie, X. (2007): Ferric iron in Al-bearing akimotoite coexisting with iron-nickel metal in a shock-melt vein in an L-6 chondrite. American Mineralogist, 92, 1545-1549.

Internet Links for Akimotoite

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    Localities for Akimotoite

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    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Queensland
      • South Gregory
        • Tenham Station
    		No reference listed
    China
     
    • Jiangsu Province
      • Taizhou Prefecture
        • Taizhou City
          • Sixiangkou
    		Zhang, A., et al (2006): Lunar and Planetary Science, 37, 1069; Miyajima, N., El Goresy, A., Dupas-Bruzek, C., Seifert, F., Rubie, D.C., Chen, M., Xie, X. (2007): Ferric iron in Al-bearing akimotoite coexisting with iron-nickel metal in a shock-melt vein in an L-6 chondrite. American Mineralogist, 92, 1545-1549.
    Nigeria
     
    • Katsina State
    		Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
    USA
     
    • Texas
      • Randall Co.
    		Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
    Mineral and/or Locality
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