Phyllotungstite Mineral Data

Phyllotungstite Mineral Data +

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Phyllotungstite Information

Chemical Formula:

CaFe+++3H(WO4)6·10(H2O)

Composition:

Molecular Weight = 1,875.87 gm

Calcium 2.14 % Ca 2.99 % CaO

Iron 8.93 % Fe 12.77 % Fe₂O₃

Hydrogen 1.13 % H 10.08 % H₂O

Tungsten 58.80 % W 74.16 % WO₃

Oxygen 29.00 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaFe³⁺₃H(WO₄)₆·10(H₂O)

Environment:

Secondary tungsen mineral.

IMA Status:

Approved IMA 1984

Locality:

Clara mine, Oberwolfach, Schwarzwald, Baden-Wurttenberg, Germay. Link to MinDat.org Location Data.

Name Origin:

Named for the crystal habit and composition.

Search for Phyllotungstite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Phyllotungstite Crystallography

Axial Ratios:

a:b:c =0.579:1:1.5528

Cell Dimensions:

a = 7.29, b = 12.59, c = 19.55, Z = 3; V = 1,794.32 Den(Calc)= 5.21

Crystal System:

OrthorhombicSpace Group: P 222,Pmm2,P mmm

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

By Intensity(I/I_o): 3.13(1), 1.822(0.8), 3.25(0.8),

Physical Properties of Phyllotungstite

Cleavage:

[001] Perfect

Color:

Yellow.

Density:

5.26

Diaphaniety:

Translucent

Fracture:

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

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Scaly - Morphology like fish scales.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2 - Gypsum

Luster:

Pearly

Streak:

yellowish

Optical Properties of Phyllotungstite

Gladstone-Dale:

CI meas= -0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2219,KPDmeas= 0.2198,KC= 0.2076

Optical Data:

Biaxial (-), a=2.1, b=2.183-2.185, g=2.185, bire=0.0850, 2V(Calc)=0-16, 2V(Meas)=0-18.

Calculated Properties of Phyllotungstite

Electron Density:

r_electron=4.68 gm/cc
note: r_{Phyllotungstite}=5.26 gm/cc.

Fermion Index

Fermion Index = 0.08603
Boson Index = 0.91397

Photoelectric:

PE_{Phyllotungstite}= 715.97 barns/electron
U=PE_{Phyllotungstite} x r_electron=3,352.72 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Phyllotungstite is Not Radioactive

Phyllotungstite Classification

Dana Class:

49.2.4.1 (49)Basic and Hydrated Molybdates and Tungstates

(49.2)(Hydrated)

(49.2.4)Dana Group

49.2.4.1 Phyllotungstite CaFe3H(WO4)6·10(H2O) P 222,Pmm2,P mmm Ortho

Strunz Class:

VI/G.02-40 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/G - Molybdates [MoO4]2- and wolframates [WO4]2-

VI/G.02 - Lindgrenite - Phyllotungstite series

VI/G.02-05 Biehlite! (Sb,As)2MoO6 C 2/c 2/m

VI/G.02-10 Lindgrenite Cu3(MoO4)2(OH)2 P 2₁/n 2/m

VI/G.02-15 Szenicsite Cu3MoO4(OH)4 Pnnm, Pnn2 Ortho

VI/G.02-20 Cuprotungstite Cu3(WO4)2(OH)2 Unk Tetra

VI/G.02-25 Vergasovaite! Cu3O[(Mo,S)O4][SO4] P nma 2/m 2/m 2/m

VI/G.02-30 Ferrimolybdite Fe2(MoO4)3·8(H2O) Unk Ortho

VI/G.02-40 Phyllotungstite CaFe3H(WO4)6·10(H2O) P 222,Pmm2,P mmm Ortho

Other Phyllotungstite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Phyllotungstite :
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 -École des Mines de Paris

Search for Phyllotungstite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Phyllotungstite :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Phyllotungstite Mineral Data :

Ask about Phyllotungstite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Phyllotungstite Specimen Label here :

Phyllotungstite

CaFe+++3H(WO4)6·10(H2O)
Dana No: 49.2.4.1 Strunz No: VI/G.02-40
Locality:

Notes: