Tokyoite Mineral Data


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General Tokyoite Information

Help on Chemical  Formula: Chemical Formula: Ba2Mn(VO4)2(OH)
Help on Composition: Composition: Molecular Weight = 576.48 gm
   Barium     47.64 %  Ba   53.19 % BaO
   Manganese   9.53 %  Mn   13.69 % Mn2O3
   Vanadium   17.67 %  V    31.55 % V2O5
   Hydrogen    0.17 %  H     1.56 % H2O
   Oxygen     24.98 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba2Mn3+(VO4)2(OH)
Help on Environment: Environment: Mn-dominant analogue of gamagarite
Help on IMA Status: IMA Status: Proposed IMA 2003 (Dana # Added)
Help on Locality: Locality: Shiromaru Mine, Okutama, Tama district, Tokyo Prefecture, Kanto Region, Honshu Island, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals and Mineral Names (CNMMN)
Help on Synonym: Synonym: IMA2003-036
 

Tokyoite Image

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Tokyoite

Comments: Metallic reddish brown crystals of tokyoite (< 0.3 mm) on dark gray braunite matrix.
Location: Gambatesa mine, Graveglia Valley,, Genova, Italy. Scale: Picture size 4 mm.
© Tom Loomis / Dakota Matrix

Tokyoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4845:1:1.2871
Help on Cell Dimensions: Cell Dimensions: a = 9.1, b = 6.13, c = 7.89, beta = 112.2° V = 407.50
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.31(1), 2.8(0.62), 2.71(0.4),3.46(0.26), 2.9(0.19), 2.16(0.18), 3(0.16),
 

Physical Properties of Tokyoite

Help on Color: Color: Reddish black.
Help on Diaphaniety: Diaphaniety: Translucent
Help on Luster: Luster: Vitreous (Glassy)
 

Calculated Properties of Tokyoite

Help on Fermion Index Fermion Index Fermion Index = 0.08547
Boson Index = 0.91453
Help on Photoelectric: Photoelectric:

PETokyoite = 221.32 barns/electron
U=PETokyoite x relectron= . barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tokyoite is Not Radioactive

 

Tokyoite Classification

Help on  Dana Class: Dana Class: 41.10.4.4 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.4)Dana Group
 
41.10.4.1 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
41.10.4.2 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
41.10.4.3 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
41.10.4.4 Tokyoite ! Ba2Mn(VO4)2(OH) P 21/m 2/m
Help on  Strunz Class: Strunz Class: VII/B.24-22 VII - Phosphates, Arsenates and Vanadates
  VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
  VII/B.24 - Brackebuschite - Tsumebite group, Bearthite - Jamesite series
 
VII/B.24-05 Bearthite Ca2Al(PO4)2(OH) P 21/m 2/m
 
VII/B.24-10 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 21/m 2/m
 
VII/B.24-20 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 21/m 2/m
 
VII/B.24-22 Tokyoite Ba2Mn(VO4)2(OH) P 21/m 2/m
 
VII/B.24-25 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 21/m 2/m
 
VII/B.24-28 Calderonite! Pb2Fe(VO4)2(OH) P 21/m 2/m
 
VII/B.24-30 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 21/m 2/m
 
VII/B.24-40 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2·(H2O) P 21/m 2/m
 
VII/B.24-45 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2·(H2O) P 21,P 21/m Mono
 
VII/B.24-50 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 21/m 2/m
 
VII/B.24-60 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 21/m 2/m
 
VII/B.24-65 Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1
 
VII/B.24-70 Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1
 

Other Tokyoite Information

Help on See Also: See Also: Links to other databases for Tokyoite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Tokyoite

Ba2Mn(VO4)2(OH)
Dana No: 41.10.4.4 Strunz No: VII/B.24-22
Locality:

 

Notes:

 

 
   
 
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