Mineralogy Database

Calciotantite Mineral Data

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General Calciotantite Information

Help on Chemical  Formula: Chemical Formula: Ca(Ta,Nb)4O11
Help on Composition: Composition: Molecular Weight = 807.80 gm
   Calcium    4.96 %  Ca    6.94 % CaO
   Tantalum  56.00 %  Ta   68.38 % Ta2O5
   Niobium   17.25 %  Nb   24.68 % Nb2O5
   Oxygen    21.79 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaTa2.5Nb1.5O11
Help on Environment: Environment: Granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Calcium, Tantalum).
Help on Name Pronunciation: Name Pronunciation: Calciotantite + Pronunciation Say CALCIOTANTITE
Help on Synonym: Synonym: ICSD 1854
  PDF 15-679

Calciotantite Image

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  Calciotantite   Tantalite-(Mn)

Comments: SEM image showing calciotantite (CT), manganotatntalite (MTT), microlite (MT) and lithiowodginite (LW) association.
Location: Granitic pegmatites, Kalba, Kazakhstan. Scale: Scale bar 100 µm and 10 µm.
© Diederik Visser

Calciotantite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.96147
Help on Cell Dimensions: Cell Dimensions: a = 6.23, c = 12.22, Z = 2; V = 410.75 Den(Calc)= 6.53
Help on Crystal System: Crystal System: Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6322
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.508(1), 3.02(1), 1.793(0.7),

Physical Properties of Calciotantite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 7.46
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Square - Occurs as square crystals in shape or outline.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Calciotantite

Help on Optical Data: Optical Data: NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.184) where Ncalc=Dcalc*KC+1
NCalc= 2.37 - from Gladstone-Dale relationship (KC = 0.184) where Ncalc=Dmeas*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Calciotantite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 486 nm   16.90   16.30 
 551 nm   17.00   16.60 
 589 nm   17.10   16.70 
 656 nm   18.20   18.00 
Calculated Relative Intensity Colors of Calciotantite in Air
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540%

Calculated Properties of Calciotantite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.69 gm/cc
note: Specific Gravity of Calciotantite =6.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002387551
Boson Index = 0.9997612449
Help on Photoelectric: Photoelectric: PECalciotantite = 690.38 barns/electron
U=PECalciotantite x rElectron Density=3,928.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Calciotantite is Not Radioactive

Calciotantite Classification

Help on  Dana Class: Dana Class: (08)Multiple Oxides with Nb, Ta, and Ti
  (08.06)Dana Type
  (08.06.02)Calciotantite Group Calciotantite Ca(Ta,Nb)4O11 P 6322 6 2 2 Natrotantite Na2Ta4O11 R 3-c 3 2/m Irtyshite Na2(Ta,Nb)4O11 P 63/m 6/m
Help on  Strunz Class: Strunz Class: 04.DJ.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DJ -With large (� medium-sized) cations; polyhedral frameworks
04.DJ.05 Calciotantite Ca(Ta,Nb)4O11 P 6322 6 2 2
04.DJ.05 Irtyshite Na2(Ta,Nb)4O11 P 63/m 6/m
04.DJ.05 Natrotantite Na2Ta4O11 R 3-c 3 2/m

Other Calciotantite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Calciotantite :
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: 04.DJ.05





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