Ixiolite Mineral Data

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General Ixiolite Information

Chemical Formula:

(Ta,Nb,Sn,Mn++,Fe++)O2

Composition:

Molecular Weight = 160.21 gm

Tantalum 56.47 % Ta 68.96 % Ta₂O₅

Manganese 6.86 % Mn 8.86 % MnO

Niobium 5.80 % Nb 8.30 % Nb₂O₅

Iron 3.49 % Fe 4.48 % FeO

Tin 7.41 % Sn 9.41 % SnO₂

Oxygen 19.97 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ta_0.5Mn²⁺_0.2Sn_0.1Nb_0.1Fe²⁺_0.1O₂

Environment:

Accessory mineral in granitic pegmatites. Alters to wodginite on heating.

IMA Status:

Valid Species (Pre-IMA) 1857

Locality:

Skogbole, Kemio (Kimito) Island, Finland. Link to MinDat.org Location Data.

Name Origin:

For "Ixion", of Greek mythology, who was related to Tantalus, in allusion to the mineral's relationship to tantalite.

Name Pronunciation:

Ixiolite

Synonym:

ICSD 12141

PDF 15-733

Ixiolite Image

Images:

Ixiolite

Comments: Hemispherical crystalline aggregate of ixiolite.
Location: Muiane mine, Zambesia, Mozambique. Scale: Specimen size 1.3 cm.
© John Veevaert

Ixiolite Crystallography

Axial Ratios:

a:b:c =0.8248:1:0.4487

Cell Dimensions:

a = 9.481, b = 11.494, c = 5.158, Z = 16; beta = 90.8° V = 562.04 Den(Calc)= 7.57

Crystal System:

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

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

By Intensity(I/I_o): 2.98(1), 3.65(0.32), 1.459(0.29),

Crystal Structure:

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Nickel E H , Rowland J F , McAdam R C , American Mineralogist , 48 (1963) p.961-979, Ixiolite - a columbite substructure, sample M-6591, note that the coordinates have been put into the proper setting

View Additional jPOWD Structure files for Ixiolite
[1]

Physical Properties of Ixiolite

Cleavage:

{???} Indistinct

Color:

Gray, Black, Steel gray.

Density:

6.94 - 7.23, Average = 7.08

Diaphaneity:

Opaque

Fracture:

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

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Habit:

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

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Metallic

Streak:

dark brown

Optical Properties of Ixiolite

Optical Data:

NCalc= 2.25 - from Gladstone-Dale relationship (KC = 0.1657) where Ncalc=Dcalc*KC+1
NCalc= 2.17 - from Gladstone-Dale relationship (KC = 0.1657) where Ncalc=Dmeas*KC+1

Calculated Properties of Ixiolite

Electron Density:

Bulk Density (Electron Density)=6.54 gm/cc
note: Specific Gravity of Ixiolite =7.57 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Ixiolite= 709.42 barns/electron
U=PE_Ixiolite x rElectron Density=4,639.31 barns/cc.

Radioactivity:

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

Ixiolite Classification

Dana Class:

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

(08.01)where A BO4

(08.01.10)Dana Group

08.01.10.01 Ixiolite (Ta,Nb,Sn,Mn,Fe)O2 P 2/c 2/m

Strunz Class:

04.DB.25 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.25 Ixiolite (Ta,Nb,Sn,Mn,Fe)O2 P 2/c 2/m

04.DB.25 Ishikawaite (U,Fe,Y,Ca)(Nb,Ta)O4(?) Unk Ortho

04.DB.25 Srilankite (Ti,Zr)O2 P bcn 2/m 2/m 2/m

04.DB.25 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m

04.DB.25 Samarskite-(Yb)! (Yb,Y,REE,U,Th,Ca,Fe)(Nb,Ta,Ti)O4 P 2/c 2/m

04.DB.25 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho

Other Ixiolite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3)

See Also:

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

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Ixiolite

(Ta,Nb,Sn,Mn++,Fe++)O2
Dana No: 08.01.10.01 Strunz No: 04.DB.25
Locality:

Notes: