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Akaogiite

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Formula:
TiO
 
2
System:Monoclinic
Name:Named after Masaki Akaogi, Professor at the Department of Chemistry, Gakushuin University in Tokyo, Japan.
Polymorph of:Anatase, Brookite, Rutile, TiO2 II


Baddeleyite Group.

A TiO2 polymorph with a baddeleyite-like structure, resulting from high pressure impact at a meteorite crater.

Classification of Akaogiite

IMA status:Approved 2008
mindat.org URL:http://www.mindat.org/min-35912.html
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Type Occurrence of Akaogiite

Co-type Localities:Altebürg, Ries Crater, Nördlingen, Swabia, Bavaria, Germany
Seelbronn Quarry, Amerdingen, Ries Crater, Nördlingen, Swabia, Bavaria, Germany
Otting, Wemding, Ries Crater, Nördlingen, Swabia, Bavaria, Germany
Associated Minerals at type locality:
TiO2 II

Crystallography of Akaogiite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 4.606Å, b = 4.986Å, c = 4.933Å
β = 99.17°
Ratio:a:b:c = 0.924 : 1 : 0.989
Unit Cell Volume:V 111.84 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
2.929(100)
2.626(91)
2.494(24)
2.437(42)
2.017(40)
1.742(40)
1.686(42)
1.54(31)

Chemical Properties of Akaogiite

Formula:
TiO
 
2
Essential elements:O, Ti
All elements listed in formula:O, Ti

Other Names for Akaogiite

Synonyms:
IMA2007-058
Other Languages:

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 Akaogiite

Reference List:

- +
El Goresy, A., Dubrovinsky, L.S., Gillet, P., Graup, G., Chen, M. (2010): Akaogiite: An ultra-dense polymorph of TiO2 with seven-coordinated titanium, in shocked garnet gneisses from the Ries Crater, Germany. American Mineralogist, 95, 892-895.

Internet Links for Akaogiite

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    • Localities for Akaogiite

    Hide Locality List
    (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.
    Germany
     
    • Bavaria
      • Swabia
        • Nördlingen
          • Ries Crater
    		IMA website
            • Amerdingen
    		IMA website
            • Wemding
    		IMA website
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