Mineralogy Database

Behierite Mineral Data

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General Behierite Information

Help on Chemical  Formula: Chemical Formula: (Ta,Nb)BO4
Help on Composition: Composition: Molecular Weight = 224.06 gm
   Tantalum  51.69 %  Ta   63.11 % Ta2O5
   Niobium   14.93 %  Nb   21.35 % Nb2O5
   Boron      4.82 %  B    15.54 % B2O3
   Oxygen    28.56 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ta0.64Nb0.36(BO4)
Help on Environment: Environment: Granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Manjaka and Antsongombato, south of Betafo, Madagascar. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jean Behier (1903-1965), French mineralogist, Geological Survey of Madagascar, who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Behierite + Pronunciation Say BEHIERITE
Help on Synonym: Synonym: ICSD 63202
  PDF 7-131

Behierite Image

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Comments: A light brownish crystal of behierite in matrix.
Location: Manjaka, Sahatany Valley, Antsirabe Region, Madagascar. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Behierite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.88172
Help on Cell Dimensions: Cell Dimensions: a = 6.206, c = 5.472, Z = 4; V = 210.75 Den(Calc)= 7.06
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.1(1), 2.327(0.71), 3.1(0.71),

Physical Properties of Behierite

Help on Color: Color: Pink gray.
Help on Density: Density: 7.81 - 7.91, Average = 7.86
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 7-7.5 - Quartz-Garnet
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Behierite

Help on Optical Data: Optical Data: NCalc= 2.31 - from Gladstone-Dale relationship (KC = 0.1859) where Ncalc=Dcalc*KC+1
NCalc= 2.46 - from Gladstone-Dale relationship (KC = 0.1859) where Ncalc=Dmeas*KC+1

Calculated Properties of Behierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.21 gm/cc
note: Specific Gravity of Behierite =7.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0098000546
Boson Index = 0.9901999454
Help on Photoelectric: Photoelectric: PEBehierite = 629.54 barns/electron
U=PEBehierite x rElectron Density=3,906.98 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Behierite is Not Radioactive

Behierite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.01)where (A)2 XO4
  (24.01.02)Dana Group Behierite (Ta,Nb)BO4 I 41/amd 4/m 2/m 2/m Schiavinatoite! (Nb,Ta)BO4 I 41/amd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AC.15 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.15 Behierite (Ta,Nb)BO4 I 41/amd 4/m 2/m 2/m
06.AC.15 Schiavinatoite! (Nb,Ta)BO4 I 41/amd 4/m 2/m 2/m

Other Behierite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Behierite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 06.AC.15





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