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Akimotoite

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Formula:
(Mg,Fe2+)SiO3
May contain minor Al.
Colour:
colourless
Lustre:
Vitreous
Crystal System:
Trigonal
Member of:
Name:
Named in honor of Syun-iti Akimoto (秋本俊一) (December 20, 1925, Tokyo, Japan - July 14, 2004), 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)2SiO4 at mantle conditions.
Ilmenite Group. A high-pressure phase and the Mg-analogue of hemleyite and the Si-analogue of geikielite.



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Classification of AkimotoiteHide

Approved
Approval Year:
1997
4.CB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations

Pronounciation of AkimotoiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of AkimotoiteHide

Vitreous
Colour:
colourless
Streak:
white

Chemical Properties of AkimotoiteHide

Formula:
(Mg,Fe2+)SiO3

May contain minor Al.
IMA Formula:
MgSiO3

Crystallography of AkimotoiteHide

Crystal System:
Trigonal

Type Occurrence of AkimotoiteHide

Synonyms of AkimotoiteHide

Other Language Names for AkimotoiteHide

Relationship of Akimotoite to other SpeciesHide

Member of:
Other Members of this group:
Ecandrewsite(Zn,Fe2+,Mn2+)TiO3Trig. 3 : R3
GeikieliteMgTiO3Trig. 3 : R3
Hemleyite(Fe2+0.48Mg0.37Ca0.04Na0.04Mn2+0.03Al0.03Cr3+0.01)sum=1.00Si1.00O3Trig. 3 : R3
IlmeniteFe2+TiO3Trig. 3 : R3
PyrophaniteMn2+TiO3Trig. 3 : R3
Unnamed (Fe-Cr Oxide)FeCrO3Trig. 3 : R3

Related Minerals - Nickel-Strunz GroupingHide

4.CB.05BrizziiteNaSb5+O3Trig. 3 : R3
4.CB.05CorundumAl2O3Trig. 3m (3 2/m) : R3c
4.CB.05Ecandrewsite(Zn,Fe2+,Mn2+)TiO3Trig. 3 : R3
4.CB.05EskolaiteCr2O3Trig.
4.CB.05GeikieliteMgTiO3Trig. 3 : R3
4.CB.05HematiteFe2O3Trig. 3m (3 2/m) : R3c
4.CB.05IlmeniteFe2+TiO3Trig. 3 : R3
4.CB.05KarelianiteV3+2O3Trig.
4.CB.05MelanostibiteMn2+(Sb5+,Fe3+)O3Trig.
4.CB.05PyrophaniteMn2+TiO3Trig. 3 : R3
4.CB.05Unnamed (Auroantimonate)AuSbO3
4.CB.05UM1998-11-O-AuHSbAu+2Sb3+O2(OH)
4.CB.05TistariteTi3+2O3Trig. 3m (3 2/m) : R3c
4.CB.10AvicenniteTl2O3Iso. m3 (2/m 3) : Ia3
4.CB.10BixbyiteMn3+2O3Iso. m3 (2/m 3) : Ia3
4.CB.15Armalcolite(Mg,Fe2+)Ti2O5Orth. mmm (2/m 2/m 2/m)
4.CB.15PseudobrookiteFe2TiO5Orth. mmm (2/m 2/m 2/m)
4.CB.20Zincohögbomite-2N2S[(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2Hex. 6mm : P63mc
4.CB.20Zincohögbomite-2N6S[(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2Hex. 6mm : P63mc
4.CB.20Magnesiohögbomite-6N6S[(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6Trig. 3m (3 2/m) : R3m
4.CB.20Magnesiohögbomite-2N3S[(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2Trig. 3m (3 2/m) : P3 1m
4.CB.20Magnesiohögbomite-2N2S[(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2Hex. 6mm : P63mc
4.CB.20Ferrohögbomite-6N12S[(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6Trig. 3m (3 2/m) : R3m
4.CB.25PseudorutileFe2Ti3O9Hex.
4.CB.25KleberiteFeTi6O11(OH)5Mon. 2/m : P21/b
4.CB.30BerdesinskiiteV3+2TiO5Mon.
4.CB.30OxyvaniteV3+2V4+O5Mon. 2/m : B2/b
4.CB.35Olkhonskite(Cr,V)2Ti3O9Mon.
4.CB.35SchreyeriteV3+2Ti3O9Mon.
4.CB.40KamiokiteFe2Mo3O8Hex.
4.CB.40NolaniteV3+8Fe3+2O14(OH)2Hex.
4.CB.40RinmaniteZn2Sb2Mg2Fe4O14(OH)2Hex. 6 : P63
4.CB.40IseiteMn2Mo3O8Hex. 6mm : P63mc
4.CB.40MajindeiteMg2Mo3O8Hex. 6mm : P63mc
4.CB.45ClaudetiteAs2O3Mon. 2/m
4.CB.45StibioclaudetiteAsSbO3Mon. 2/m : P21/m
4.CB.50ArsenoliteAs2O3Iso. m3m (4/m 3 2/m) : Fd3m
4.CB.50SenarmontiteSb2O3Iso. m3m (4/m 3 2/m) : Fd3m
4.CB.55ValentiniteSb2O3Orth. mmm (2/m 2/m 2/m) : Pccn
4.CB.60BismiteBi2O3Mon. 2/m : P21/b
4.CB.65SphaerobismoiteBi2O3Tet.
4.CB.70SilléniteBi12SiO20Iso. 2 3 : I2 3
4.CB.75KyzylkumiteV3+Ti2O5(OH)Mon. 2/m : P21/b
4.CB.80TietaiyangiteFe3+4Fe2+TiO9Hex.

Other InformationHide

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

References for AkimotoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 AkimotoiteHide

Localities for AkimotoiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Antarctica
 
  • Eastern Antarctica
    • American Highland
      • Grove Mountains
YT Lin, Lu Feng, Sen Hu (2011) High Pressure Mineral Assemblages in the Lherzolitic Shergottite Grove Mountains (GRV) 020090. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
Lu Feng, Masaaki Miyahara, Toshiro Nagase, Eiji Ohtani, Sen Hu, Ahmed El Goresy, Yangting Lin (2011) Shock Conditions and Formation Mechanism of Akimotoite-Pyroxene Glass Assemblages in the Grove Mountains (GRV) 052082. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
    • Queen Maud Land
      • Queen Fabiola Mts (Yamato Mts)
Ozawa, S., Ohtani, E., Suzuki, A., Miyahara, M., Terada, K., & Kimura, M. (2007, December). Shock metamorphism of L6 chondrites Sahara 98222 and Yamato 74445: the PT conditions and the shock age. In AGU Fall Meeting Abstracts.
Kato, Y., Sekine, T., Kayama, M., Miyahara, M., & Yamaguchi, A. (2017). High‐pressure polymorphs in Yamato‐790729 L6 chondrite and their significance for collisional conditions. Meteoritics & Planetary Science, 52(12), 2570-2585.
Australia (TL)
 
  • Queensland
    • Barcoo Shire
      • Windorah
        • Tenham Station
American Mineralogist, Volume 84, pages 267–271, 1999; T. Ferroir, M. Miyahara, E. Ohtani, P.Beck, A. Simionovici P. Gillet and A. El Goresy 72nd Meeting of the Meteoritical Society: Abstracts Page A69 No. 5143; O. Tschauner et al. (2018) Structure analysis and conditions of formation of akimotoite in the Tenham chondrite: Meteoritics & Planetary Science 53 (1): 62-74. (Jan 2018).
Canada
 
  • Alberta
    • Peace River
Tomioka, N. & Miyahara, M. (2017) High-pressure minerals in shocked meteorites: Meteoritics & Planetary Science 52(9): 2017-2039. (Sept 2017).
China
 
  • Hubei
    • Suizhou
      • Zengdu District (Cengdou District)
        • Xihe
Chen, M., & Xie, X. (2015). Shock-produced akimotoite in the Suizhou L6 chondrite. Science China Earth Sciences, 58(6), 876-880.
  • Jiangsu
    • Taizhou
      • Gaogang District
        • 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.
Morocco
 
  • Souss-Massa Region
    • Tata Province
Baziotis, I. P., Liu, Y., DeCarli, P. S., Melosh, H. J., McSween, H. Y., Bodnar, R. J., & Taylor, L. A. (2013). The Tissint Martian meteorite as evidence for the largest impact excavation. Nature Communications, 4, 1404.
Nigeria
 
  • Katsina
Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf
Oman
 
  • Dhofar
Litasov, K. D., Badyukov, D. D., & Pokhilenko, N. P. (2019, March). Formation parameters of high-pressure minerals in the Dhofar 717 AND 864 chondrite meteorites. In Doklady Earth Sciences (Vol. 485, No. 1, pp. 327-330). Pleiades Publishing.
Litasov, K. D., Badyukov, D. D., & Pokhilenko, N. P. (2019, March). Formation parameters of high-pressure minerals in the Dhofar 717 AND 864 chondrite meteorites. In Doklady Earth Sciences (Vol. 485, No. 1, pp. 327-330). Pleiades Publishing.
USA
 
  • Texas
    • Randall Co.
Zhidong Xie et al. , Lunar and Planetary Science XXXVI (2005), 1216.pdf; Tomioka, N. & Miyahara, M. (2017) High-pressure minerals in shocked meteorites: Meteoritics & Planetary Science 52(9): 2017-2039. (Sept 2017).
 
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