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Behierite Mineral Data
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General Behierite Information
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 Chemical Formula: |
(Ta,Nb)BO4 |
| Composition: |
Molecular Weight = 224.06 gm |
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Tantalum 51.69 % Ta 63.11 % Ta2O5 |
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Niobium 14.93 % Nb 21.35 % Nb2O5 |
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Boron 4.82 % B 15.54 % B2O3 |
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Oxygen 28.56 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ta0.64Nb0.36(BO4) |
| Environment: |
Granite pegmatites. |
| IMA Status: |
Approved IMA 1962 |
| Locality: |
Manjaka and Antsongombato, south of Betafo, Madagascar. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Jean Behier (1903-1965), French mineralogist, Geological Survey of Madagascar, who discovered the mineral. |
| Name Pronunciation: |
Behierite + Pronunciation  |
| Synonym: |
ICSD 63202 |
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PDF 7-131 |
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Behierite Image |
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Images:
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Behierite Crystallography
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| Axial Ratios: |
a:c = 1:0.88172 |
| Cell Dimensions: |
a = 6.206, c = 5.472, Z = 4; V = 210.75 Den(Calc)= 7.06 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd |
| X Ray Diffraction: |
By Intensity(I/Io): 4.1(1), 2.327(0.71), 3.1(0.71), |
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Physical Properties of Behierite
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| Color: |
Pink gray. |
| Density: |
7.81 - 7.91, Average = 7.86 |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Hardness: |
7-7.5 - Quartz-Garnet |
| Luster: |
Adamantine |
| Streak: |
white |
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Optical Properties of Behierite
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| 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
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Calculated Properties of Behierite
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| Electron Density: |
Bulk Density (Electron Density)=6.21 gm/cc
note: Specific Gravity of Behierite =7.06 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0098000546
Boson Index = 0.9901999454 |
| Photoelectric: |
PEBehierite = 629.54 barns/electron
U=PEBehierite x rElectron Density=3,906.98 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Behierite is Not Radioactive |
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Behierite Classification
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| Dana Class: |
24.01.02.01 (24)Borates - Anhydrous |
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(24.01)where (A)2 XO4 |
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(24.01.02)Dana Group |
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24.01.02.01 Behierite (Ta,Nb)BO4 I 41/amd 4/m 2/m 2/m |
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24.01.02.02 Schiavinatoite! (Nb,Ta)BO4 I 41/amd 4/m 2/m 2/m |
| Strunz Class: |
06.AC.15 06 - BORATES |
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06.A - Monoborates |
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06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc. |
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06.AC.15 Behierite (Ta,Nb)BO4 I 41/amd 4/m 2/m 2/m |
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06.AC.15 Schiavinatoite! (Nb,Ta)BO4 I 41/amd 4/m 2/m 2/m |
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Other Behierite Information
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| References: |
NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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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Print or Cut-and-Paste your Behierite Specimen Label here :
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Behierite
(Ta,Nb)BO4
Dana No: 24.01.02.01 Strunz No: 06.AC.15
Locality:
Notes:
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