Lithiotantite Mineral Data

General Lithiotantite Information

Chemical Formula:

Li(Ta,Nb)3O8

Composition:

Molecular Weight = 611.75 gm

Lithium 1.13 % Li 2.44 % Li₂O

Tantalum 66.55 % Ta 81.26 % Ta₂O₅

Niobium 11.39 % Nb 16.29 % Nb₂O₅

Oxygen 20.92 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiTa_2.25Nb_0.75O₈

Environment:

In microcline-albite zones of granite pegmatites.

IMA Status:

Approved IMA 1983

Locality:

Undisclosed locality [Kalba Mountians] in eastern Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for LITHIum and TANTalum in the composition.

Name Pronunciation:

Lithiotantite + Pronunciation

Lithiotantite Image

Images:

Lithiotantite

Comments: White lithotantite crystals.
Location: Ognevka Deposit, Kalbinskii Range, Kazakhstan. Scale: Specimen Size 3x2 mm.
© Sonke Stolze / Systematic Minerals

Lithiotantite Crystallography

Axial Ratios:

a:b:c =1.4758:1:3.0243

Cell Dimensions:

a = 7.444, b = 5.044, c = 15.255, Z = 4; beta = 107.18° V = 547.23 Den(Calc)= 7.42

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.96(1), 1.45(0.8), 1.722(0.8),

Physical Properties of Lithiotantite

Cleavage:

None

Color:

Colorless, Pink.

Density:

Diaphaneity:

Transparent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Adamantine

Streak:

white

Optical Properties of Lithiotantite

Gladstone-Dale:

CI meas= 0.261 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.302 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1213,KPDmeas= 0.1286,KC= 0.1739
Ncalc = 2.22 - 2.29

Optical Data:

Biaxial (?), a=1.9

RL Anisotrophism:

Weak.

RL Color:

Creamy pink to brownish pink next to cassiterite; grayish white otherwise.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Lithiotantite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
486 nm	18.60	18.50
553 nm	18.50	18.30
589 nm	18.60	18.30
656 nm	19.10	19.00

**Calculated Relative Intensity Colors of Lithiotantite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	480%
R₁
R₂

Calculated Properties of Lithiotantite

Electron Density:

Bulk Density (Electron Density)=6.00 gm/cc
note: Specific Gravity of Lithiotantite =7.00 gm/cc.

Fermion Index:

Fermion Index = 0.0010312544
Boson Index = 0.9989687456

Photoelectric:

PE_{Lithiotantite}= 818.91 barns/electron
U=PE_{Lithiotantite} x rElectron Density=4,910.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lithiotantite is Not Radioactive

Lithiotantite Classification

Dana Class:

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

(08.07)Dana Type

(08.07.07)Dana Group

08.07.07.01 Lithiotantite Li(Ta,Nb)3O8 P 2₁/c 2/m

Strunz Class:

04.DB.40 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.40 Ferrowodginite FeSnTa2O8 C 2/c 2/m

04.DB.40 Lithiotantite Li(Ta,Nb)3O8 P 2₁/c 2/m

04.DB.40 Lithiowodginite LiTa3O8 C 2/c 2/m

04.DB.40 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m

04.DB.40 Titanowodginite (Mn,Fe)(Ti,Sn)(Ta,Nb)2O8 C 2/c 2/m

04.DB.40 Wodginite Mn(Sn,Ta)(Ta,Nb)2O8 C 2/c 2/m

04.DB.40 Ferrotitanowodginite! FeTiTa2O8 C 2/m 2/m

Other Lithiotantite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Lithiotantite :
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 Lithiotantite Specimen Label here :

Lithiotantite

Li(Ta,Nb)3O8
Dana No: 08.07.07.01 Strunz No: 04.DB.40
Locality:

Notes:

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