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Takéuchiite

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About TakéuchiiteHide

Yoshio Takéuchi
Formula:
(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
Colour:
Black
Lustre:
Sub-Metallic
Hardness:
6
Specific Gravity:
3.93 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Yoshio Takéuchi (20 January 1924, Tokyo, Japan - 5 July 2009, Tokyo, Japan), professor, University of Tokyo, who predicted the existance of a compound with a structure found in this mineral, and made major contributions to solving the structures of the pinakiolite group of minerals.
This page provides mineralogical data about Takéuchiite.


Classification of TakéuchiiteHide

Approved
Approval Year:
1980
First Published:
1980
6.AB.40

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
24.2.6.1

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.7.8

9 : Borates
7 : Borates of Mn

Physical Properties of TakéuchiiteHide

Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Brown
Hardness:
Density:
3.93 g/cm3 (Calculated)

Chemical Properties of TakéuchiiteHide

Formula:
(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2
IMA Formula:
Mg2Mn3+O2(BO3)

Crystallography of TakéuchiiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 27.5 Å, b = 12.61 Å, c = 6.04 Å
Ratio:
a:b:c = 2.181 : 1 : 0.479
Unit Cell V:
2,094.52 ų (Calculated from Unit Cell)

Type Occurrence of TakéuchiiteHide

Place of Conservation of Type Material:
Smithsonian Institution, l38548
Reference:
Bovin, J.O., O’Keeffe, M. (1980) Takéuchiite, a new oxyborate mineral from Långban, Sweden. American Mineralogist: 65: 1130-1133.

Synonyms of TakéuchiiteHide

Other Language Names for TakéuchiiteHide

Relationship of Takéuchiite to other SpeciesHide

Other Members of this group:
BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.
Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite4 photos of Takéuchiite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.20Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)Orth.
6.AB.20YuanfuliiteMg(Fe3+,Al)O(BO3)Orth.
6.AB.25KarliteMg7(BO3)3(OH,Cl)5Orth.
6.AB.30Azoproite(Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2Orth.
6.AB.30BonaccorditeNi2Fe3+(BO3)O2Orth.
6.AB.30FredrikssoniteMg2(Mn3+,Fe3+)(BO3)O2Orth.
6.AB.30LudwigiteMg2Fe3+(BO3)O2Orth.
6.AB.30VonseniteFe2+2Fe3+(BO3)O2Orth.
6.AB.35Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.40ChestermaniteMg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2Orth.
6.AB.40Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
6.AB.45Hulsite(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2Mon.
6.AB.45Magnesiohulsite(Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2Mon.
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50FluoboriteMg3(BO3)(F,OH)3Hex.
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.60GaudefroyiteCa4Mn3+2-3(BO3)3(CO3)(O,OH)3Hex.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna
6.AB.85PainiteCaZrAl9(BO3)O15Hex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.7.1Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
9.7.2Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
9.7.3Jimboite(Mn2+,Mg)3[BO3]2Orth.
9.7.4SussexiteMn2+BO2(OH)Orth. 2 2 2 : P21 21 2
9.7.5Wiserite(Mn,Mg)14[Cl|(OH)8|(Si,Mg)(O,OH)4|(B2O5)4]Tet.
9.7.6KurchatoviteCa(Mg,Mn2+)[B2O5]Orth.
9.7.7ClinokurchatoviteCa(Mg,Fe2+,Mn2+)[B2O5]Mon.
9.7.9BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
9.7.10TusioniteMn2+Sn4+[BO3]2Trig. 3 : R3

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 TakéuchiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bovin, J.O., O’Keeffe, M. (1980) Takéuchiite, a new oxyborate mineral from Långban, Sweden. American Mineralogist: 65: 1130-1133.
Bovin, J.O., O'Keefe, M., O'Keefe, M.A. (1981) Electron microscopy of oxyborates. I. Defect structures in the minerals pinakiolite, ludwigite, orthopinakiolite, and takéuchiite. Acta Crystallographica: A37: 28-35.
Dunn, P.J., Chao, G.Y., Fitzpatrick, J.J., Langley, R.H., Fleischer, M., Zilczer, J.A. (1986) New mineral names. American Mineralogist: 71: 227-232.
Norrestam, R., Bovin, J.O. (1987) The crystal structure of takéuchiite, Mg1.71Mn1.29BO5: A combined single crystal X-ray and HRTEM study. Zeitschrift für Kristallographie: 181: 135-149.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Cooper, M.A., Hawthorne, F.C. (1998) The crystal structure of blatterite, Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32, and structural hierarchy in Mn3+-bearing zigzag borates. The Canadian Mineralogist: 36: 1171-1193.
Frost, R.L. (2011) Raman spectroscopy of selected borate minerals of the pinakiolité group. Journal of Raman Spectroscopy: 42: 540-543.

Internet Links for TakéuchiiteHide

Localities for TakéuchiiteHide

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.
Sweden (TL)
 
  • Värmland
    • Filipstad
Amer.Min.(1980) 65, 1130-1133; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
Mineral and/or Locality  
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