Mineralogy Database

Zairite Mineral Data

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General Zairite Information

Help on Chemical  Formula: Chemical Formula: Bi(Fe+++,Al)3(PO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 646.86 gm
   Aluminum     3.13 %  Al    5.91 % Al2O3
   Iron        19.43 %  Fe   27.77 % Fe2O3
   Bismuth     32.31 %  Bi   36.02 % Bi2O3
   Phosphorus   9.58 %  P    21.94 % P2O5
   Hydrogen     0.93 %  H     8.36 % H2O
   Oxygen      34.63 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BiFe3+2.25Al0.75(PO4)2(OH)6
Help on Environment: Environment: Rare mineral in the weathering zone of quartz wolframite deposits.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Eta-Etu district, northern Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the country where the first specimens were collected.
Help on Name Pronunciation: Name Pronunciation: Zairite Say ZAIRITE

Zairite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.33285
Help on Cell Dimensions: Cell Dimensions: a = 7.015, c = 16.365, Z = 3; V = 697.43 Den(Calc)= 4.62
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): 2.945(1), 5.71(0.95), 3.503(0.4),

Physical Properties of Zairite

Help on Color: Color: Greenish, Greenish white, Yellow green.
Help on Density: Density: 4.37
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white

Optical Properties of Zairite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.163 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.208 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1769,KPDmeas= 0.1871,KC= 0.2234
Ncalc = 1.98 - 2.03
Help on Optical Data: Optical Data: Uniaxial (-), e=1.81, w=1.82-1.83, bire=0.0100-0.0200.

Calculated Properties of Zairite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Zairite =4.37 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0042861484
Boson Index = 0.9957138516
Help on Photoelectric: Photoelectric: PEZairite = 568.65 barns/electron
U=PEZairite x rElectron Density=2,299.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zairite is Not Radioactive

Zairite 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 Zairite 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 Zairite :
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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