Tokyoite
A valid IMA mineral species
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About Tokyoite
Formula:
Ba2Mn3+(VO4)2(OH)
Colour:
Red black
Lustre:
Vitreous
Hardness:
4½ - 5
Specific Gravity:
4.62 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named after the prefecture of occurrence.
See also the possible ordered As analogue: 'Unnamed (Possible Ordered As-analogue of Tokyoite)'.
The Mn3+ analogue of gamagarite.
The Mn3+ analogue of gamagarite.
Unique Identifiers
Mindat ID:
25633
Long-form identifier:
mindat:1:1:25633:1
Similar Names
| Tokkoite | A valid IMA mineral species | K2Ca4[Si7O18(OH)](OH,F) |
IMA Classification of Tokyoite
Approved
IMA Formula:
Ba2Mn3+(V5+O4)2(OH)
Approval year:
2003
First published:
2004
Type description reference:
Classification of Tokyoite
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Tky | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Tokyoite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Tokyoite
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)
Chemistry of Tokyoite
Mindat Formula:
Ba2Mn3+(VO4)2(OH)
Element Weights:
Crystallography of Tokyoite
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°
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.31 Å | (100) |
| 2.80 Å | (60) |
| 2.71 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) | |
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] |
Geological Setting:
Metamorphosed Mn ores.
Type Occurrence of Tokyoite
General Appearance of Type Material:
Reddish brown micrograins and microcrystals.
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan (NSM-M 28569).
Geological Setting of Type Material:
Metamorphosed low-grade sedimentary manganese ore.
Associated Minerals at Type Locality:
Synonyms of Tokyoite
Other Language Names for Tokyoite
Relationship of Tokyoite to other Species
Member of:
Other Members of Brackebuschite Supergroup:
| Aldomarinoite | Sr2Mn3+(AsO4)2(OH) | Mon. 2/m : P21/m |
| Arsenbrackebuschite | Pb2Fe3+(AsO4)2(OH) | Mon. 2/m : P2/m |
| Arsentsumebite | Pb2Cu(AsO4)(SO4)(OH) | Mon. 2/m : P21/m |
| Bearthite | Ca2Al(PO4)2(OH) | Mon. 2/m : P21/m |
| Brackebuschite | Pb2Mn3+(VO4)2(OH) | Mon. 2/m : P21/m |
| Bushmakinite | Pb2Al(PO4)(VO4)(OH) | Mon. 2/m : P21/m |
| Calderónite | Pb2Fe3+(VO4)2(OH) | Mon. 2/m : P21/m |
| Canosioite | Ba2Fe3+(AsO4)2(OH) | Mon. 2/m : P21/m |
| Feinglosite | Pb2Zn(AsO4)2 · H2O | Mon. 2/m |
| Ferribushmakinite | Pb2Fe3+(PO4)(VO4)(OH) | Mon. 2/m : P21/m |
| Gamagarite | Ba2Fe3+(VO4)2(OH) | Mon. 2/m : P21/m |
| Goedkenite | Sr2Al(PO4)2(OH) | Mon. 2/m : P21/m |
| Grandaite | Sr2Al(AsO4)2(OH) | Mon. 2/m : P21/m |
| Lombardoite | Ba2Mn3+(AsO4)2(OH) | Mon. 2/m : P21/m |
| Tsumebite | Pb2Cu(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 Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.BG. | Aldomarinoite | Sr2Mn3+(AsO4)2(OH) |
| 8.BG. | Dongchuanite | Pb4ZnZn2(PO4)4(OH)2 |
| 8.BG. | Cuprodongchuanite | Pb4CuZn2(PO4)4(OH)2 |
| 8.BG. | Canosioite | Ba2Fe3+(AsO4)2(OH) |
| 8.BG.05 | Feinglosite | Pb2Zn(AsO4)2 · H2O |
| 8.BG.05 | Lombardoite | Ba2Mn3+(AsO4)2(OH) |
| 8.BG.05 | Bearthite | Ca2Al(PO4)2(OH) |
| 8.BG.05 | 'Unnamed (possible ordered As-analogue of Tokyoite)' | Ba2Mn[(As,V)O4]2(OH) |
| 8.BG.05 | Gamagarite | Ba2Fe3+(VO4)2(OH) |
| 8.BG.05 | Arsentsumebite | Pb2Cu(AsO4)(SO4)(OH) |
| 8.BG.05 | 'UM1994-19-PO:CuHMoPb' | Pb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH) |
| 8.BG.05 | Ferribushmakinite | Pb2Fe3+(PO4)(VO4)(OH) |
| 8.BG.05 | Arsenbrackebuschite | Pb2Fe3+(AsO4)2(OH) |
| 8.BG.05 | Goedkenite | Sr2Al(PO4)2(OH) |
| 8.BG.05 | Tsumebite | Pb2Cu(PO4)(SO4)(OH) |
| 8.BG.05 | Brackebuschite | Pb2Mn3+(VO4)2(OH) |
| 8.BG.05 | Bushmakinite | Pb2Al(PO4)(VO4)(OH) |
| 8.BG.05 | Calderónite | Pb2Fe3+(VO4)2(OH) |
| 8.BG.10 | Mélonjosephite | CaFe2+Fe3+(PO4)2(OH) |
| 8.BG.15 | Tancoite | LiNa2Al(PO4)(PO3OH)(OH) |
| 8.BG.20 | Dmisokolovite | K3Cu5AlO2(AsO4)4 |
| 8.BG.25 | Shchurovskyite | K2CaCu6O2(AsO4)4 |
| 8.BG.30 | Wrightite | K2Al2O(AsO4)2 |
| 8.BG.35 | Polyarsite | Na7CaMgCu2(AsO4)4F2Cl |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Tokyoite
mindat.org URL:
https://www.mindat.org/min-25633.html
Please feel free to link to this page.
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References for Tokyoite
Reference List:
Matsubara, Satoshi, Miyawaki, Ritsuro, Yokoyama, Kazumi, Shimizu, Masaaki, Imai, Hiroyuki (2004) Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences, 99 (6) 363-367 doi:10.2465/jmps.99.363
Localities for Tokyoite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Austria | |
| Kolitsch et al. (2018) |
Germany | |
| Raber (2011) |
| Scheven et al. (2022) |
Italy | |
| Bracco et al. (1999) +1 other reference |
| Pavel M. Kartashov analytical data |
| Bracco R. (2014) +2 other references |
Japan | |
| Takashi Yamada (2008) |
| Am Min 90:1468 +2 other references |
South Africa | |
| Costin et al. (2015) |
| Kumba Iron Ore |
| Costin et al. (2014) +1 other reference |
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Cerchiara Mine, Borghetto di Vara, La Spezia Province, Liguria, Italy