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Tokyoite

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About TokyoiteHide

Formula:
Ba2Mn3+(VO4)2(OH)
Colour:
Red black
Lustre:
Vitreous
Hardness:
4½ - 5
Specific Gravity:
4.62 (Calculated)
Crystal System:
Monoclinic
Name:
Named after the prefecture of occurrence.
See also the possible ordered As analogue: 'Unnamed (Possible Ordered As-analogue of Tokyoite)'.


Classification of TokyoiteHide

Approved
Approval Year:
2003
8.BG.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1

Pronounciation of TokyoiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of TokyoiteHide

Vitreous
Transparency:
Translucent
Colour:
Red black
Streak:
Deep brownish red
Hardness:
4½ - 5 on Mohs scale
Hardness:
VHN25=363 - 390 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
4.62 g/cm3 (Calculated)

Chemical Properties of TokyoiteHide

Formula:
Ba2Mn3+(VO4)2(OH)
IMA Formula:
Ba2Mn3+(VO4)2OH
Idealised Formula:
Ba2Mn3+[OH|(VO4)2]

Crystallography of TokyoiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 9.104 Å, b = 6.132 Å, c = 7.895 Å
β = 112.2°
Ratio:
a:b:c = 1.485 : 1 : 1.288
Unit Cell V:
408 ų
Morphology:
Small aggregates of irregular grains.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.31 (100)
2.80 (60)
2.71 (40)

Type Occurrence of TokyoiteHide

General Appearance of Type Material:
Reddish brown micrograins and microcrystals
Geological Setting of Type Material:
Metamorphosed low-grade sedimentary manganese ore

Synonyms of TokyoiteHide

Other Language Names for TokyoiteHide

German:Tokyoit
Japanese:東京石
Simplified Chinese:东京石
Traditional Chinese:東京石

Relationship of Tokyoite to other SpeciesHide

Other Members of this group:
ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
BearthiteCa2Al(PO4)2(OH)Mon. 2/m : P21/m
BrackebuschitePb2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
CalderónitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
FerribushmakinitePb2Fe3+(PO4)(VO4)(OH)Mon. 2/m : P21/m
GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
GrandaiteSr2Al(AsO4)2(OH)Mon. 2/m : P21/m
LombardoiteBa2Mn3+(AsO4)2(OH)Mon. 2/m : P21/m
TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
Unnamed (possible ordered As-analogue of Tokyoite)Ba2Mn[(As,V)O4]2(OH)Mon. 2/m : P21/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite2 photos of Tokyoite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BG.CanosioiteBa2Fe3+(AsO4)2(OH)Mon. 2/m : P21/m
8.BG.05ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05BearthiteCa2Al(PO4)2(OH)Mon. 2/m : P21/m
8.BG.05BrackebuschitePb2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.05GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
8.BG.05UM1994-19-PO:CuHMoPbPb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH)
8.BG.05TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
8.BG.05ArsenbrackebuschitePb2Fe3+(AsO4)2(OH)Mon. 2/m : P2/m
8.BG.05FeinglositePb2Zn(AsO4)2 · H2OMon. 2/m
8.BG.05BushmakinitePb2Al(PO4)(VO4)(OH)Mon. 2/m : P21/m
8.BG.05CalderónitePb2Fe3+(VO4)2(OH)Mon. 2/m : P21/m
8.BG.10MélonjosephiteCaFe2+Fe3+(PO4)2(OH)
8.BG.15TancoiteLiNa2Al(PO4)(HPO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca

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 TokyoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Matsubara, S., Miyawaki, R., Yokoyama, K., Shimizu, M., Imai, H. (2004): Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences 99, 363-367.

Internet Links for TokyoiteHide

Localities for TokyoiteHide

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.
Austria
 
  • Tyrol
    • North Tyrol
      • Sill valley (Wipp valley)
        • Obernberg valley
Kolitsch, U., Schachinger, T. & Auer, C. (2018): 2076) Aegirin, Aegirin-Augit, Albit, Baddeleyit, Baryt, Brandtit(?), Braunit, Calcit, Canosioit, Clinosuenoit (ehemals „Manganocummingtonit“), Coelestin, Diaspor, Dolomit, Fluorapatit (As-haltig), Fluorcalcioroméit, Gamagarit, Hämatit, Hausmannit, Hjalmarit, Hollandit, Hydroxycalcioroméit, Klinochlor, Kutnohorit, Mischkristalle Manganiandrosit-(La) - Manganiakasakait-(La), Nambulit, Phlogopit, Piemontit, Pyrobelonit, Sb-haltiger Pyrophanit, Quarz, Ranciéit(?), Rhodochrosit, Rhodonit, Richterit, Rutil, Spessartin, Talk, Thorit, Tremolit, Tilasit, Titanit, Tokyoit, Wakefieldit-(Ce), Wakefieldit-(Y), Zirkon, das Sb-Analogon von Hydroxymanganopyrochlor und unbenanntes LaAsO4 vom Obernberger Tribulaun, Nordtirol - ein erster Bericht über mineralogisch komplexe, linsenförmige metamorphe Manganvererzungen. Pp. 206-213 in Walter, F. et al. (2018): Neue Mineralfunde aus Österreich LXVII. Carinthia II, 208./128., 185-254.
Germany
 
  • Saarland
    • Wadern
      • Krettnich
Raber, T. (2011): Tokyoit aus Krettnich, Saarland - Eine Mineralogische Städtepartnerschaft. Lapis 26 (10), 58-59 (in German).
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
          • Reppia
Bracco, R. (2003): Tamaite-O e tokyoite: due storie diverse, due minerali liguri in Giappone. Notiziario di Mineralogia del Ferrania Club, 17, 17-19; Bracco, R., Marchesini, M., Mezzano, I. (1999): Gambatesa 1999: l’anno del vanadio. Notiziario di Mineralogia del Ferrania Club, 13, 5-7.
    • La Spezia Province
      • Vara Valley
        • Borghetto Vara
Pavel M. Kartashov analytical data, material Castellaro Fabrizio
  • Piedmont
    • Cuneo Province
      • Maira Valley
        • Canosio
          • Vallone della Valletta
Bracco R. (2014) Sempre novità "estere". Segnalazioni in breve. Prie, 10, 48; Cámara, F., Bittarello, E., Ciriotti, M.E., Nestola, F., Radica, F., Marchesini, M. (2015) Arsenic-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: II. Braccoite, NaMn2+5[Si5AsO17(OH)](OH), description and crystal structure. Mineralogical Magazine, 79, 171-189; Cámara, F., Bittarello, E., Ciriotti, M.E., Nestola, F., Radica, F., Massimi, F., Balestra, C., Bracco, R. (2017a) As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: III. Canosioite, Ba2Fe3+(AsO4)2(OH), description and crystal structure. Mineralogical Magazine, 81, 305–317.
Japan (TL)
 
  • Honshu Island
    • Kanto Region
      • Tokyo Metropolis
        • Nishi-Tama-gun
          • Okutama-cho
Am Min 90:1468; Matsubara S, Miyawaki R, Yokoyama K, Shimizu M, Imai H (2004) Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences 99, 363-367; photo in: Koubutsu Doshikai (2017) Kanto-to Shuhen-no Koubutsu (279pp).
  • Kyushu Region
    • Nansei Archipelago
      • Kagoshima Prefecture
        • Amami-Oshima Island
          • Yamato-son (Yamato village)
Takashi Yamada, et al (2008) JAKOKA: 2008 Annual Meeting of the Japan Association of Mineralogical Sciences, R4-01.
South Africa
 
  • Northern Cape Province
Costin, G., Fairey, B., Tsikos, H., Gucsik, A. (2015): Tokyoite, As-Rich Tokyoite, and Noélbensonite: New Occurrences From the Postmasburg Manganese Field, Northern Cape Province, South Africa. The Canadian Mineralogist: 53: 981-990
Costin, G., Fairey, B., Tsikos, H. and Gucsik, A. (2016). Tokyoite, As-rich tokyoite and noélbensonite: new occurrences from the Postmasburg Manganese Field, Northern Cape province, South Africa. The Canadian Mineralogist, 53, 981-990.
Mineral and/or Locality  
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