Tapiolite Mineral Data

Tapiolite Mineral Data
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General Tapiolite Information

Help on Chemical Formula: Chemical Formula: (Fe,Mn)(Ta,Nb)2O6
Help on Composition: Composition: Molecular Weight = 495.95 gm
   Tantalum   65.67 %  Ta   80.19 % Ta2O5
   Manganese   2.22 %  Mn    2.86 % MnO
   Niobium     3.75 %  Nb    5.36 % Nb2O5
   Iron        9.01 %  Fe   11.59 % FeO
   Oxygen     19.36 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.8Mn2+0.2Ta1.8Nb0.2O6
Help on Environment: Environment: Pegmatites and alluvial deposits.
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Sukkula, Finland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1863 after the god Tapio of Finnish mythology. Now a group name.
Help on Name Pronunciation: Name Pronunciation: Tapiolite + Pronunciation Say TAPIOLITE
 

Tapiolite Image

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Tapiolite   Tapiolite-(Fe)

Comments: Twinned, brown, dipyramid crystal of ferrotapiolite.
Location: Sapucaia district, Galileia, Minas Gerais, Brazil. Scale: 4.2x3.1x3.1 cm.
© Richard Dale / Dale Minerals
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Tapiolite   Tapiolite-(Mn)

Comments: Black opaque resinous massive manganotapiolite.
Location: Skogbole Mine, Kimito, Turku ja Pori, Finland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Tapiolite   Tapiolite-(Fe)

Comments: Ferrotapiolite crystal in white quartz and mica matrix.
Location: Quixabá Mine, Frei Martinho, Paraíba Brazil. Scale: Crystal size 1 x 0.8 cm.
© Fabre Minerals

Tapiolite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.9411
Help on Cell Dimensions: Cell Dimensions: a = 4.754, c = 9.228, Z = 2; V = 208.56 Den(Calc)= 7.90
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 41/mnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.74(1), 2.56(0.8), 3.33(0.8),
 

Physical Properties of Tapiolite

Help on Cleavage: Cleavage: {110} Imperfect
Help on Color: Color: Black.
Help on Density: Density: 8.17
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: brown
 

Optical Properties of Tapiolite

Help on Optical Data: Optical Data: NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.1629) where Ncalc=Dcalc*KC+1
NCalc= 2.33 - from Gladstone-Dale relationship (KC = 0.1629) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Tapiolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.80 gm/cc
note: Specific Gravity of Tapiolite =7.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0020815203
Boson Index = 0.9979184797
Help on Photoelectric: Photoelectric: PETapiolite = 795.69 barns/electron
U=PETapiolite x rElectron Density=5,409.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tapiolite is Not Radioactive
 

Tapiolite Classification
Help on Dana Class: Dana Class: 08.03.01.00 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.01)Tapiolite Series
 
08.03.01.00 Tapiolite* (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
08.03.01.01 Tapiolite-(Fe) (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
08.03.01.02 Tapiolite-(Mn) (Mn,Fe)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.DB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DB -With medium-sized cations; chains of edge-sharing octahedra
 
04.DB.10 Bystromite MgSb2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite-(Fe) (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Ordonezite ZnSb2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite-(Mn) (Mn,Fe)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 
04.DB.10 Tapiolite* (Fe,Mn)(Ta,Nb)2O6 P 41/mnm 4/m 2/m 2/m
 

Other Tapiolite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tapiolite :
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
10 - Ruff.Info
11 - WWW-MINCRYST

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Tapiolite

(Fe,Mn)(Ta,Nb)2O6
Dana No: 08.03.01.00 Strunz No: 04.DB.10
Locality:

 

Notes: