Lithiowodginite Mineral Data

Lithiowodginite Mineral Data +

General Lithiowodginite Information

Chemical Formula:

LiTa3O8

Composition:

Molecular Weight = 677.78 gm

Lithium 1.02 % Li 2.20 % Li₂O

Tantalum 80.09 % Ta 97.80 % Ta₂O₅

Oxygen 18.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiTa₃O₈

Environment:

In the albite zone of granite pegmatite.

IMA Status:

Approved IMA 1990

Locality:

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

Name Origin:

Named for the dominant LITHium content and the relationship to wodginite.

Synonym:

ICSD 493

IMA1988-011

PDF 36-1480

Lithiowodginite Image

Images:

Lithiowodginite

Comments: Black crystalline grains of lithiowodginite in pegmatite.
Location: Tanco Mine, Bernic Lake, Manitoba, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lithiowodginite Crystallography

Axial Ratios:

a:b:c =0.8198:1:0.4395

Cell Dimensions:

a = 9.441, b = 11.516, c = 5.062, Z = 4; beta = 91.06° V = 550.26 Den(Calc)= 8.18

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 2.987(1), 3.65(0.82), 2.94(0.5),

Crystal Structure:

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Ercit T S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 30 (1992) p.597-611, The wodginite group. I. Structural crystallography, Sample: TSE-76

Physical Properties of Lithiowodginite

Cleavage:

None

Color:

Brown, Pink, Red.

Density:

7.5

Diaphaniety:

Translucent to Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Adamantine

Streak:

pale pink

Optical Properties of Lithiowodginite

Optical Data:

Biaxial (?)

NCalc= 2.26 - from Gladstone-Dale relationship (KC = 0.1544) where Ncalc=Dcalc*KC+1
NCalc= 2.16 - from Gladstone-Dale relationship (KC = 0.1544) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong.

RL Bireflectance:

Weak.

RL Color:

Grayish white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Lithiowodginite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
486 nm	14.10	13.00
553 nm	14.00	12.90
589 nm	14.30	13.00
656 nm	14.00	12.50

**Calculated Relative Intensity Colors of Lithiowodginite in Air**
Relative Intensity	0%	70%	100%	140%	210%	280%	350%	420%	490%	560%	630%	690%
R₁
R₂

Calculated Properties of Lithiowodginite

Electron Density:

r_electron=6.90 gm/cc
note: r_{Lithiowodginite}=8.18 gm/cc.

Fermion Index

Fermion Index = 0.00095
Boson Index = 0.99905

Photoelectric:

PE_{Lithiowodginite}= 977.29 barns/electron
U=PE_{Lithiowodginite} x r_electron=6,746.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lithiowodginite is Not Radioactive

Lithiowodginite Classification

Dana Class:

8.1.8.4 (8)Multiple Oxides with Nb, Ta, and Ti

(8.1)where A BO4

(8.1.8)Dana Group

8.1.8.1 Wodginite Mn(Sn,Ta)(Ta,Nb)2O8 C 2/c 2/m

8.1.8.2 Ferrowodginite FeSnTa2O8 C 2/c 2/m

8.1.8.3 Titanowodginite (Mn,Fe)(Ti,Sn)(Ta,Nb)2O8 C 2/c 2/m

8.1.8.4 Lithiowodginite LiTa3O8 C 2/c 2/m

8.1.8.5 Ferrotitanowodginite! FeTiTa2O8 C 2/m 2/m

8.1.8.6 IMA2000-026! (Mn,Li)4(Ta,Sn)4(Ta,Nb)8O32 C 2/c 2/m

Strunz Class:

IV/D.17-70 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.17 - Qitianglinite - Lithiowodginite series

IV/D.17-05 Koragoite (Mn,Fe)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20 P 2₁ 2

IV/D.17-10 Qitianlingite Fe2Nb2WO10 P bcn 2/m 2/m 2/m

IV/D.17-20 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

IV/D.17-30 Ixiolite (Ta,Nb,Sn,Mn,Fe)O2 P 2/c 2/m

IV/D.17-40 Titanowodginite (Mn,Fe)(Ti,Sn)(Ta,Nb)2O8 C 2/c 2/m

IV/D.17-50 Wodginite Mn(Sn,Ta)(Ta,Nb)2O8 C 2/c 2/m

IV/D.17-55 Ferrotitanowodginite! FeTiTa2O8 C 2/m 2/m

IV/D.17-60 Ferrowodginite FeSnTa2O8 C 2/c 2/m

IV/D.17-70 Lithiowodginite LiTa3O8 C 2/c 2/m

Other Lithiowodginite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.76,p667,1991) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Lithiowodginite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Lithiowodginite

LiTa3O8
Dana No: 8.1.8.4 Strunz No: IV/D.17-70
Locality:

Notes: