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Béhierite

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Jean Béhier
Formula:
TaBO4
System:
Tetragonal
Colour:
Greyish pink
Lustre:
Adamantine
Hardness:
7 - 7½
Name:
After Jean Béhier (1903-1965), French mineralogist, Service Géologique, Madagascar, who found the mineral in 1959.
The tantalum analogue of schiavinatoite. The second mineral with essential tantalum and boron after holtite.


Classification of Béhierite

Approved
6.AC.15

6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
24.1.2.1

24 : ANHYDROUS BORATES
1 : A2XO4
9.6.6

9 : Borates
6 : Borates of Ti, Sn and Ta

Physical Properties of Béhierite

Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
Greyish pink
Streak:
White
Hardness (Mohs):
7 - 7½
Hardness Data:
Measured
Cleavage:
Distinct/Good
{110} and {010}
Fracture:
Sub-Conchoidal
Density:
7.86(5) g/cm3 (Measured)    7.91 g/cm3 (Calculated)

Optical Data of Béhierite

Type:
Uniaxial (+)
Comments:
nω and nε > 2

Chemical Properties of Béhierite

IMA Formula:
TaBO4
Elements listed in formula:

Crystallography of Béhierite

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Cell Parameters:
a = 6.206(5) Å, c = 5.472(5) Å
Ratio:
a:c = 1 : 0.882
Unit Cell Volume:
V 210.75 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Pseudo-octahedral crystals. Forms: {011}
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.10 (100)
3.10 (71)
2.327 (71)
2.478 (50)
1.600 (50)
1.93 (35)
Comments:
Very close to schiavinatoite.

Type Occurrence of Béhierite

General Appearance of Type Material:
4 grayish-pink pseudo-octahedral crystals, 0.5 to 7.0 mm in size.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 139602.
Geological Setting of Type Material:
A complex LCT granite pegmatite hosted in a marble

Relationship of Béhierite to other Species

6.AC.05SinhaliteMgAlBO4
6.AC.10PseudosinhaliteMg2Al3B2O9(OH)
6.AC.15SchiavinatoiteNbBO4
6.AC.20FroloviteCa[B(OH)4]2
6.AC.25HexahydroboriteCa[B(OH)4]2 · 2H2O
6.AC.30HenmiliteCa2Cu[B(OH)4]2(OH)4
6.AC.35BandyliteCuB(OH)4Cl
6.AC.40TeepleiteNa2B(OH)4Cl
6.AC.45Moydite-(Y)YB(OH)4CO3
6.AC.50CarboboriteCa2Mg[B(OH)4]2(CO3)2 · 4H2O
6.AC.55SulfoboriteMg3[B(OH)4]2(SO4)(OH,F)2
6.AC.60LüneburgiteMg3[B2(OH)6(PO4)2] · 6H2O
6.AC.65SeamaniteMn32+B(OH)4(PO4)(OH)2
6.AC.70CahniteCa2B(AsO4)(OH)4
9.6.1Warwickite(Mg,Ti,Fe,Cr,Al)2O(BO3)
9.6.2AzoproiteMg2[(Ti,Mg),Fe3+]O2BO3
9.6.3NordenskiöldineCaSn4+(BO3)2
9.6.4HulsiteFe22+Fe3+O2(BO3)
9.6.5MagnesiohulsiteMg2Fe3+O2(BO3)

Other Names for Béhierite

Name in Other Languages:
German:Behierit
Spanish:Behierita

Other Information

Other Information:
Insoluble in hot or cold acids.
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 Béhierite

Reference List:
Behier, J. (1960) Travaux mineralogiques. Republique Malgache, Rapport Annuel du Service Géologique, Tananarive: 181-199.

Fleischer, M. (1961) New mineral names. American Mineralogist: 46: 765-770.

Mrose, M.E., Rose, H.J. (1961) Behierite, (Ta,Nb)BO4, a new mineral from Manjaka, Madagascar. Geological Society of America, Abstracts Annual Meetings 1961, 111A.

Behier, J. (1962) Travaux mineralogiques. Rep. Malgache, Rapport Annuel Service Géologique, Tananarive: 257 pp.

Fleischer, M. (1962) New Mineral Names. American Mineralogist: 47: 414-420.

International Mineralogical Association (1967) Commission on new minerals and mineral names. Mineralogical Magazine: 36: 131-136.

Ranorosoa, N. (1986) Etude minéralogique et microtèrmomiques des pegmatites du champ de la Sahatany. Thèse de Doctorat de l`Université Paul Sabatier, Toulouse. 232 pp.

Range, K.J., Wildenauer, M., Heyns, A.M. (1988) Extrem kurze nichtbindende Sauerstoff-Sauerstoff-abstände: Die Kristallstrukturen von NbBO4, NaNb3O8 und NaTa3O8. Angewandte Chemie: 100: 973-975.

Pezzotta, F. (2001) Schiavinatoit und Behierit aus Madagaskar. Lapis: 10/2001: 47-48.

Hålenius, U., Hatert, F., Pasero, M., Mills, S.J. (2015) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 28. New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine: 79: 1859-1864.

Internet Links for Béhierite

mindat.org URL:
https://www.mindat.org/min-602.html
Please feel free to link to this page.
Specimens:
The following Béhierite specimens are currently listed for sale on minfind.com.

Localities for Béhierite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Madagascar
 
  • Antananarivo Province
    • Vakinankaratra Region
      • Betafo District
        • Andrembesoa Commune
          • FKT Antsentsindrano
Demartin, F. et al (2001): Schiavinatoite,(Nb,Ta)BO4, the Nb analogue of behierite. European Journal of Mineralogy 13, 159-165
          • Tetezantsio-Andoabatokely Pegmatite Field
Pezzotta, Federico (2007): Ta-Nb borates and other rare accessory phases in granitic pegmatites of the Itremo region, central Madagascar. Bergverksmuseet Skrift 35,97-98
Pezzotta, Federico (2007): Ta-Nb borates and other rare accessory phases in granitic pegmatites of the Itremo region, central Madagascar. Bergverksmuseet Skrift 35,97-98
Pezzotta, F.(2007): Ta-Nb borates and other rare accessory phases in granitic pegmatites of the Itremo region, central Madagascar. Norsk Bergverksmuseum Skrift. 35,97-98
      • Sahatany Pegmatite Field (Mt Ibity area)
        • Manandona Valley
Falster, A.U. and Simmons, W.B.(2002): A second world location for behierite in Florence county, Wisconsin. Rocks & Minerals may-june 2002
        • Sahatany Valley
Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Norsk Bergverksmuseums Skrift. 25, 5-18; Pezzotta, F.(2007): Ta-Nb borates and other rare accessory phases in granitic pegmatites of the Itremo region, central Madagascar. Norsk Bergverksmuseum Skrift. 35,97-98
Mrose, M.E. & Rose jr, J. (1961): Behierite, (Ta, Nb)BO4, a new mineral from Manjaka, Madagascar. Geol.Soc.Am, Abstracts 1961 Ann. Meetings, p 111A
USA
 
  • Wisconsin
    • Florence Co.
      • Fern
Rocks & Min. (2002) 77:170
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