Qitianlingite Mineral Data

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General Qitianlingite Information

Chemical Formula:

Fe++2Nb2W++++++O10

Composition:

Molecular Weight = 641.35 gm

Niobium 28.97 % Nb 41.45 % Nb₂O₅

Iron 17.42 % Fe 22.40 % FeO

Tungsten 28.67 % W 36.15 % WO₃

Oxygen 24.95 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₂Nb₂WO₁₀

Environment:

Pegmatite dike in granite.

IMA Status:

Approved IMA 1985

Locality:

Qitianling, Hunan Province, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Qitianlingite + Pronunciation

Synonym:

ICSD 65617

PDF 41-1415

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Qitianlingite Crystallography

Axial Ratios:

a:b:c =4.1422:1:0.8815

Cell Dimensions:

a = 23.706, b = 5.723, c = 5.045, Z = 4; V = 684.45 Den(Calc)= 6.22

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bcn

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

By Intensity(I/I_o): 2.96(1), 1.773(0.8), 3.65(0.7),

Crystal Structure:

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Zhizhong P , Su W , Zhesheng M , Guangming Y , Kexue Tongbao , 33 (1988) p.856-861, The crystal structure of qitianlingite (Fe2Nb2WO10), Locality: Qitianling, Hunan Province, China

Physical Properties of Qitianlingite

Color:

Black.

Density:

6.42

Diaphaneity:

Opaque

Hardness:

5.5 - Knife Blade

Luster:

Sub Metallic

Optical Properties of Qitianlingite

Optical Data:

NCalc= 2.34 - from Gladstone-Dale relationship (KC = 0.215) where Ncalc=Dcalc*KC+1
NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.215) where Ncalc=Dmeas*KC+1

Calculated Properties of Qitianlingite

Electron Density:

Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Qitianlingite =6.22 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Qitianlingite}= 395.63 barns/electron
U=PE_{Qitianlingite} x rElectron Density=2,210.05 barns/cc.

Radioactivity:

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

Qitianlingite Classification

Dana Class:

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

(08.01)where A BO4

(08.01.12)Dana Group

08.01.12.01 Qitianlingite Fe2Nb2WO10 P bcn 2/m 2/m 2/m

Strunz Class:

04.DB.35 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.35 Columbite-(Mg) (Mg,Fe,Mn)(Nb,Ta)2O6 Pcan 2/m 2/m 2/m

04.DB.35 Tantalite-(Fe) FeTa2O6 Pcan 2/m 2/m 2/m

04.DB.35 Columbite-(Fe) FeNb2O6 Pcan 2/m 2/m 2/m

04.DB.35 Columbite-(Mn) (Mn,Fe)(Nb,Ta)2O6 Pcan 2/m 2/m 2/m

04.DB.35 Qitianlingite Fe2Nb2WO10 P bcn 2/m 2/m 2/m

04.DB.35 Tantalite-(Mn) MnTa2O6 Pcan 2/m 2/m 2/m

04.DB.35 Tantalite-(Mg)! (Mg,Fe)(Ta,Nb)2O6 P bcn 2/m 2/m 2/m

Other Qitianlingite Information

References:

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

See Also:

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

Qitianlingite

Fe++2Nb2W++++++O10
Dana No: 08.01.12.01 Strunz No: 04.DB.35
Locality:

Notes: