Ferritungstite Mineral Data

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General Ferritungstite Information

Chemical Formula:

(K,Ca,Na)(W++++++,Fe+++)2(O,OH)6•(H2O)

Composition:

Molecular Weight = 416.40 gm

Potassium 1.88 % K 2.26 % K₂O

Sodium 0.11 % Na 0.15 % Na₂O

Calcium 0.96 % Ca 1.35 % CaO

Iron 6.71 % Fe 8.63 % FeO

Hydrogen 0.68 % H 6.06 % H₂O

Tungsten 66.23 % W 83.52 % WO₃

Oxygen 23.44 % O

______ ______

100.00 % 101.96 % = TOTAL OXIDE

Empirical Formula:

K_0.2Ca_0.1Na_0.02W_1.5Fe²⁺_0.5O_4.7(H₂O)_1.4

Environment:

An alteration coating on and replacing primary tungsten minerals.

IMA Status:

Valid Species (Pre-IMA) 1911

Locality:

Germania tungsten mine, Deer Trail district, Fruitland, Stevens County, Washington, USA. Link to MinDat.org Location Data.

Name Origin:

Named for FERRIc iron and TUNGsten in its composition.

Name Pronunciation:

Ferritungstite

Synonym:

ICSD 79158

PDF 11-331

Ferritungstite Image

Images:

Ferritungstite

Comments: Small, yellow crystals of ferritungstite on matrix.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Ferritungstite Crystallography

Cell Dimensions:

a = 10.352, Z = 8; V = 1,109.36 Den(Calc)= 4.99

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 2.966(1), 5.94(1), 3.1(0.9),

Crystal Structure:

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Ercit T S , Robinson G W , The Canadian Mineralogist , 32 (1994) p.567-574, A refinement of the structure of ferritungstite from Kalzas mountain, Yukon, and, observations on the tungsten pyrochlores, Locality: Kalzas mountain, Yukon, Canada

Physical Properties of Ferritungstite

Color:

Yellow, Brownish yellow.

Density:

5.02 - 5.2, Average = 5.1

Diaphaneity:

Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Ferritungstite

Gladstone-Dale:

CI meas= -0.171 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.199 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2244,KPDmeas= 0.2192,KC= 0.1872
Ncalc = 1.93 - 1.97

Optical Data:

Isotropic, n=2.09-2.15.

Calculated Properties of Ferritungstite

Electron Density:

Bulk Density (Electron Density)=4.46 gm/cc
note: Specific Gravity of Ferritungstite =5.11 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_{Ferritungstite}= 821.78 barns/electron
U=PE_{Ferritungstite} x r_electron=3,663.15 barns/cc.

Radioactivity:

GRapi = 23.64 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferritungstite per GRapi unit = 4.23 (%)

Estimated Radioactivity from Ferritungstite - barely detectable

Ferritungstite Classification

Dana Class:

04.05.05.01 (04)Simple Oxides

(04.05)with a cation charge of 6+ (A++++++ O3)

(04.05.05)Dana Group

04.05.05.01 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m

04.05.05.02 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m

Strunz Class:

04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DH -With large (± medium-sized) cations; sheets of edge-sharing octahedra

04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic

04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m

04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m

04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m

04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m

04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m

04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m

04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m

04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

04.DH.15 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m

Other Ferritungstite Information

References:

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

See Also:

Links to other databases for Ferritungstite :
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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Ferritungstite

(K,Ca,Na)(W++++++,Fe+++)2(O,OH)6•(H2O)
Dana No: 04.05.05.01 Strunz No: 04.DH.15
Locality:

Notes: