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Waylandite Mineral Data

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General Waylandite Information

Help on Chemical  Formula: Chemical Formula: BiAl3(PO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 581.91 gm
   Aluminum    13.91 %  Al   26.28 % Al2O3
   Bismuth     35.91 %  Bi   40.04 % Bi2O3
   Phosphorus  10.65 %  P    24.39 % P2O5
   Hydrogen     1.04 %  H     9.29 % H2O
   Oxygen      38.49 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BiAl3(PO4)2(OH)6
Help on Environment: Environment: Rare secondary mineral replacing primary bismuth minerals.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Wampewo pegmatite, Gamba Hill, near Kampala, southwest Uganda. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Edgar James Wayland, first Director of the Uganda Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Waylandite + Pronunciation Say WAYLANDITE

Waylandite Image

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  Waylandite   Bismite

Comments: Gray massive stream rounded waylandite with tan bismite crusts.
Location: Mumba, Nord-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Waylandite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.3162
Help on Cell Dimensions: Cell Dimensions: a = 6.9834, c = 16.175, Z = 3; V = 683.14 Den(Calc)= 4.24
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.93(1), 5.66(0.71), 3.483(0.5),

Physical Properties of Waylandite

Help on Color: Color: White, Light brown.
Help on Density: Density: 3.86
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white

Optical Properties of Waylandite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1795,KPDmeas= 0.1972,KC= 0.1919
Ncalc = 1.74 - 1.81
Help on Optical Data: Optical Data: Uniaxial (-), e=1.748, w=1.774, bire=0.0260.

Calculated Properties of Waylandite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Waylandite =3.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001866814
Boson Index = 0.9998133186
Help on Photoelectric: Photoelectric: PEWaylandite = 623.81 barns/electron
U=PEWaylandite x rElectron Density=2,234.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Waylandite is Not Radioactive

Waylandite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.12)Waylandite Group Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 08.BL.13 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
08.BL.13 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
08.BL.13 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
08.BL.13 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
08.BL.13 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
08.BL.13 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
08.BL.13 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
08.BL.13 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
08.BL.13 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
08.BL.13 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
08.BL.13 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m

Other Waylandite 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 Waylandite :
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.BL.13





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