Mineralogy Database

Ferrowyllieite Mineral Data

Search Webmineral :

General Ferrowyllieite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(PO4)3
Help on Composition: Composition: Molecular Weight = 478.55 gm
   Sodium       6.25 %  Na    8.42 % Na2O
   Calcium      1.67 %  Ca    2.34 % CaO
   Magnesium    1.02 %  Mg    1.68 % MgO
   Manganese    3.44 %  Mn    4.45 % MnO
   Aluminum     4.51 %  Al    8.52 % Al2O3
   Iron        23.57 %  Fe   30.03 % FeO /  0.33 % Fe2O3
   Phosphorus  19.42 %  P    44.49 % P2O5
   Oxygen      40.12 %  O
              ______        ______ 
              100.00 %      100.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.3Mn2+0.3Ca0.2Fe2+2Al0.8Mg0.2Fe3+0.02(PO4)3
Help on Environment: Environment: Primary phosphate in zoned granite pegmatites. Forms a series with wyllieite and with rosemaryite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Victory mine, 4 km northeast of Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Dominant ferrous iron and relationship to wyllieite.
Help on Name Pronunciation: Name Pronunciation: Ferrowyllieite + Pronunciation Say FERROWYLLIEITE

Ferrowyllieite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Deep greenish black massive ferrowyllieite with brown to white quartz.
Location: Victory Mine, near Custer, Custer County, South Dakota, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrowyllieite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9584:1:0.5131
Help on Cell Dimensions: Cell Dimensions: a = 11.868, b = 12.382, c = 6.354, Z = 4; beta = 114.52° V = 849.51 Den(Calc)= 3.74
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.674(1), 2.693(1), 6.15(0.6),

Physical Properties of Ferrowyllieite

Help on Cleavage: Cleavage: {010} Perfect, {101} Distinct
Help on Color: Color: Bluish green, Greenish black, Gray green, Dark blue green.
Help on Density: Density: 3.6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Selvage - As a reaction rim, surrounding the host mineral.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: gray green

Optical Properties of Ferrowyllieite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1849,KPDmeas= 0.1921,KC= 0.1896
Ncalc = 1.68 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.688, b=1.691, g=1.696, bire=0.0080, 2V(Calc)=76, 2V(Meas)=50. Dispersion r < v strong.
Help on Pleochroism (x): Pleochroism (x): smoky bluish gray.
Help on Pleochroism (y): Pleochroism (y): smoky bluish green.
Help on Pleochroism (z): Pleochroism (z): green.

Calculated Properties of Ferrowyllieite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Ferrowyllieite =3.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0062284789
Boson Index = 0.9937715211
Help on Photoelectric: Photoelectric: PEFerrowyllieite = 9.34 barns/electron
U=PEFerrowyllieite x rElectron Density= 32.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrowyllieite is Not Radioactive

Ferrowyllieite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.04)Alluaudite-Wyllieite Group (Wyllieite Subgroup) Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21/n 2/m Bobfergusonite Na2Mn5FeAl(PO4)6 P 21/n 2/m Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m Ferrorosemaryite! []NaFeFeAl(PO4)3 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.AC.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.15 Bobfergusonite Na2Mn5FeAl(PO4)6 P 21/n 2/m
08.AC.15 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m
08.AC.15 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 21/n 2/m
08.AC.15 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m
08.AC.15 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 21/n 2/m
08.AC.15 Ferrorosemaryite! []NaFeFeAl(PO4)3 P 21/n 2/m

Other Ferrowyllieite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Ferrowyllieite :
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

Search for Ferrowyllieite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Ferrowyllieite :

Ask about Ferrowyllieite 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 Espa´┐Żol

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


Dana No: Strunz No: 08.AC.15





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.