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Lusungite Mineral Data

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General Lusungite Information

Help on Chemical  Formula: Chemical Formula: (Sr,Pb)Fe+++3(PO4)2(OH)5•(H2O)
Help on Composition: Composition: Molecular Weight = 578.05 gm
   Strontium   11.37 %  Sr   13.44 % SrO
   Iron        28.98 %  Fe   41.44 % Fe2O3
   Phosphorus  10.72 %  P    24.56 % P2O5
   Hydrogen     1.22 %  H    10.91 % H2O
   Lead         8.96 %  Pb   10.35 % PbO2
   Oxygen      38.75 %  O
              ______        ______ 
              100.00 %      100.69 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr0.75Pb0.25Fe3+3(PO4)2(OH)5•(H2O)
Help on Environment: Environment: Found with iron oxyhydroxides ("limonite"). Discredited as being equal to benauite.
Help on IMA Status: IMA Status: Discredited IMA 1983 - Valid Species (Pre-IMA) 1958
Help on Locality: Locality: Kookobo, Kivu, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1958 for the Lusungu River, Zaire.
Help on Synonym: Synonym: Discredited IMA 1995
 

Lusungite Image

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  Lusungite   Kintoreite

Comments: Greenish-yellow kintoreite crystals on limonite and or goethite. The specimen was originally labelled lusungite in the early 1990's and reinvestigation of the specimen showed it to be kintoreite.
Location: Kintore Open Cut, Broken Hill, NSW, Australia. Scale: Specimen Size 3x6 cm.
© Diederik Visser

Lusungite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.38636
Help on Cell Dimensions: Cell Dimensions: a = 7.04, c = 16.8, Z = 3; V = 721.08 Den(Calc)= 3.99
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.98(1), 5.77(0.9), 3.53(0.6),2.48(0.4), 1.913(0.2), 2.22(0.2), 2.26(0.2), 2.2(0.1),
 

Physical Properties of Lusungite

Help on Color: Color: Dark brown, Yellowish brown.
Help on Density: Density: 4.06
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Streak: Streak: yellowish brown
 

Optical Properties of Lusungite

Help on Optical Data: Optical Data: Uniaxial (?).
  NCalc= 1.97 - from Gladstone-Dale relationship (KC = 0.2429) where Ncalc=Dcalc*KC+1
NCalc= 1.99 - from Gladstone-Dale relationship (KC = 0.2429) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Lusungite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Lusungite =3.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PELusungite = 166.03 barns/electron
U=PELusungite x rElectron Density= 632.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lusungite is Not Radioactive
 

Lusungite Classification

Help on  Dana Class: Dana Class: 42.07.03.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.03)Crandallite Group
 
42.07.03.01 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.02 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
42.07.03.03 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.04 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
42.07.03.05 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.06 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
42.07.03.07 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
42.07.03.08 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 08.BL.10 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.10 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
 
08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Ferrazite? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri
 
08.BL.10 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 3 2/m
 
08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
08.BL.10 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig
 
08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
 

Other Lusungite Information

Help on References: References: NAME( Dana8)
Help on See Also: See Also: Links to other databases for Lusungite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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

Lusungite

(Sr,Pb)Fe+++3(PO4)2(OH)5•(H2O)
Dana No: 42.07.03.04 Strunz No: 08.BL.10
Locality:

 

Notes:

 

 
   
 


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