Mineralogy Database

Wyllieite Mineral Data

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General Wyllieite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,Mn++)(Mn++,Fe++)(Fe++,Fe+++,Mg)Al(PO4)3
Help on Composition: Composition: Molecular Weight = 451.11 gm
   Sodium       3.06 %  Na    4.12 % Na2O
   Calcium      2.67 %  Ca    3.73 % CaO
   Magnesium    0.54 %  Mg    0.89 % MgO
   Manganese    9.74 %  Mn   12.58 % MnO
   Aluminum     5.98 %  Al   11.30 % Al2O3
   Iron        14.86 %  Fe   14.33 % FeO /  5.31 % Fe2O3
   Phosphorus  20.60 %  P    47.20 % P2O5
   Oxygen      42.56 %  O
              ______        ______ 
              100.00 %       99.47 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.6Ca0.3Mn2+0.8Fe2+0.9Fe3+0.3Mg0.1Al(PO4)3
Help on Environment: Environment: In zoned complex granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Old Mike mine, 6 km north-northwest for Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Peter John Wyllie (1930-), Professor of Petrology and Geochemistry, University of Chicago, Chicago, Illinois, USA.
Help on Name Pronunciation: Name Pronunciation: Wyllieite + Pronunciation Say WYLLIEITE
Help on Synonym: Synonym: ICSD 6203
  PDF 39-409

Wyllieite Image

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Comments: Dark bluish-black massive wyllieite in pegmatite.
Location: Victory Mine, Custer, Custer County, South Dakota, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wyllieite 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)= 3.53
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 Wyllieite

Help on Cleavage: Cleavage: None
Help on Color: Color: Bluish green, Greenish black, Gray green, Dark green.
Help on Density: Density: 3.601
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Metallic
Help on Streak: Streak: olive green

Optical Properties of Wyllieite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1959,KPDmeas= 0.1921,KC= 0.1957
Ncalc = 1.69 - 1.7
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.

Calculated Properties of Wyllieite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.43 gm/cc
note: Specific Gravity of Wyllieite =3.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0039284984
Boson Index = 0.9960715016
Help on Photoelectric: Photoelectric: PEWyllieite = 8.49 barns/electron
U=PEWyllieite x rElectron Density= 29.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wyllieite is Not Radioactive

Wyllieite 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 Wyllieite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Wyllieite :
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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Dana No: Strunz No: 08.AC.15





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