Wodginite Mineral Data

Wodginite Mineral Data +

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General Wodginite Information

Chemical Formula:

Mn++(Sn,Ta)(Ta,Nb)2O8

Composition:

Molecular Weight = 635.06 gm

Tantalum 56.99 % Ta 69.58 % Ta₂O₅

Manganese 8.65 % Mn 11.17 % MnO

Niobium 5.85 % Nb 8.37 % Nb₂O₅

Iron 0.88 % Fe 1.26 % Fe₂O₃

Tin 7.48 % Sn 9.49 % SnO₂

Oxygen 20.15 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Ta_0.4Sn_0.4Fe³⁺_0.1Ta_1.6Nb_0.4O₈

Environment:

Complex zoned pegmatite in amphibolite.

IMA Status:

Approved IMA 1963

Locality:

Wodgina, Marble Bar, and Greenbushes, Western Australia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 67677

PDF 29-901

Wodginite Image

Images:

Wodginite

Comments: Dark, lustrous crystal of wodginite.
Location: Sapucaia do Norte, Galileia, Minas Gerais, Brazil. Scale: 1.3 x 0.7 cm.
© John Veevaert

Wodginite Crystallography

Axial Ratios:

a:b:c =0.8299:1:0.4446

Cell Dimensions:

a = 9.52, b = 11.47, c = 5.1, Z = 4; beta = 91.3° V = 556.75 Den(Calc)= 7.58

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): 3(1), 2.95(0.7), 3.67(0.7),

Crystal Structure:

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Graham J , Thornber M R , American Mineralogist , 59 (1974) p.1040-1044, The crystal chemistry of complex niobium and tantalum oxides II. Composition and, structure of wodginite, from Wodgina, Australia

View Additional jPOWD Structure files for Wodginite
[1] [2] [3] [4]

Physical Properties of Wodginite

Cleavage:

None

Color:

Dark brown, Reddish brown, Black, Black brown.

Density:

7.19 - 7.36, Average = 7.27

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Pyramidal - Crystals are shaped like pyramids.

Hardness:

5.5 - Knife Blade

Luster:

Sub Metallic

Streak:

brown

Optical Properties of Wodginite

Optical Data:

NCalc= 2.27 - from Gladstone-Dale relationship (KC = 0.167) where Ncalc=Dcalc*KC+1
NCalc= 2.22 - from Gladstone-Dale relationship (KC = 0.167) where Ncalc=Dmeas*KC+1

Calculated Properties of Wodginite

Electron Density:

r_electron=6.54 gm/cc
note: r_Wodginite=7.58 gm/cc.

Fermion Index

Fermion Index = 0.01277
Boson Index = 0.98723

Photoelectric:

PE_Wodginite= 716.28 barns/electron
U=PE_Wodginite x r_electron=4,685.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wodginite is Not Radioactive

Wodginite Classification

Dana Class:

8.1.8.1 (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.17-50 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 Wodginite Information

References:

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

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Wodginite

Mn++(Sn,Ta)(Ta,Nb)2O8
Dana No: 8.1.8.1 Strunz No: IV/D.17-50
Locality:

Notes: