Calciotantite Mineral Data (original) (raw)

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

Click Here for Larger Calciotantite Image in a New Browser Window Images:

Click Here for Larger Calciotantite Image 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 - TrapezohedralH-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),

Click Here for Large Calciotantite Structure Window Crystal Structure:

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Help on Above

| | Cooper M A , Hawthorne F C , Cerny P , The Canadian Mineralogist , 37 (1999) p.1289-1294, Ta-Nb order in the crystal structure of niobium-rich calciotantite View Additional jPOWD Structure files for Calciotantite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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 R 2 ∑ 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

RelativeIntensity 0% 60% 100% 120% 180% 240% 300% 360% 420% 480% 540%
R1
R2

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:

08.06.02.01 (08)Multiple Oxides with Nb, Ta, and Ti

(08.06)Dana Type

(08.06.02)Calciotantite Group

08.06.02.01 Calciotantite Ca(Ta,Nb)4O11 P 6322 6 2 2

08.06.02.02 Natrotantite Na2Ta4O11 R 3-c 3 2/m

08.06.02.03 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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Ask about Calciotantite here :
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Print or Cut-and-Paste your Calciotantite Specimen Label here :

Calciotantite

Ca(Ta,Nb)4O11
Dana No: 08.06.02.01 Strunz No: 04.DJ.05
Locality:

Notes: