Laueite Mineral Data + Say LAUEITE


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General Laueite Information

Help on Chemical  Formula: Chemical Formula: Mn++Fe+++2(PO4)2(OH)2·8(H2O)
Help on Composition: Composition: Molecular Weight = 534.71 gm
   Manganese   10.27 %  Mn   13.27 % MnO
   Iron        20.89 %  Fe   29.87 % Fe2O3
   Phosphorus  11.59 %  P    26.55 % P2O5
   Hydrogen     3.39 %  H    30.32 % H2O
   Oxygen      53.86 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Fe3+2(PO4)2(OH)2·8(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Hagendorf, Waidhaus, Oberpfalz, Bayern (Bavaria), Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for M. F. T. Von Laue.
Help on Synonym: Synonym: ICSD 34808
  PDF 14-246
 

Laueite Image

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Laueite

Comments: Purple crystal of laueite on matrix.
Location: Tip Top Mine, Custer County, South Dakota, USA. Scale: Crystal size 0.4 cm.
© John Veevaert

Laueite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4953:1:0.6697
Help on Cell Dimensions: Cell Dimensions: a = 5.28, b = 10.66, c = 7.14, Z = 1; alpha = 107.9°, beta = 110.9°, gamma = 71.12° V = 338.04 Den(Calc)= 2.63
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.91(1), 3.28(0.9), 4.95(0.8),
Click Here for Large Laueite Structure Window Crystal Structure:

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Moore P B , American Mineralogist , 50 (1965) p.1884-1892, The crystal structure of laueite, MnFe2(OH)2(PO4)2(H2O)6.2H2O

 

Physical Properties of Laueite

Help on Cleavage: Cleavage: [010] Perfect
Help on Color: Color: Yellow orange, Honey brown, Light brown.
Help on Density: Density: 2.44 - 2.49, Average = 2.46
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Laueite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.039 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.099 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.245,KPDmeas= 0.2614,KC= 0.2719
Help on Optical Data: Optical Data: Biaxial (-), a=1.588-1.603, b=1.654-1.659, g=1.68-1.682, bire=0.0790-0.0920, 2V(Calc)=62, 2V(Meas)=63-66.
 

Calculated Properties of Laueite

Help on Electron Density: Electron Density:

relectron=2.48 gm/cc
note: rLaueite =2.47 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00469
Boson Index = 0.99531
Help on Photoelectric: Photoelectric:

PELaueite = 9.22 barns/electron
U=PELaueite x relectron= 22.87 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Laueite is Not Radioactive

 

Laueite Classification

Help on  Dana Class: Dana Class: 42.11.10.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq · x(H2O)
  (42.11.10)Dana Group
 
42.11.10.1 Laueite MnFe2(PO4)2(OH)2·8(H2O) P1 1
 
42.11.10.2 Stewartite MnFe2(PO4)2(OH)2·8(H2O) P1 1
 
42.11.10.3 Pseudolaueite MnFe2(PO4)2(OH)2·7-8(H2O) P 21/a 2/m
 
42.11.10.4 Ushkovite MgFe2(PO4)2(OH)2·8(H2O) P1 1
 
42.11.10.5 Ferrolaueite! FeFe2(PO4)2(OH)2·8(H2O) Tri
Help on  Strunz Class: Strunz Class: VII/D.10-50 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
  VII/D.10 - Paravauxite group
 
VII/D.10-10 Gordonite MgAl2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.10-20 Ushkovite MgFe2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.10-30 Paravauxite FeAl2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.10-35 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.10-40 Sigloite FeAl2(PO4)2(OH)3·5(H2O) P1 1
 
VII/D.10-45 Ferrolaueite! FeFe2(PO4)2(OH)2·8(H2O) Tri
 
VII/D.10-50 Laueite MnFe2(PO4)2(OH)2·8(H2O) P1 1
 

Other Laueite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Laueite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Laueite

Mn++Fe+++2(PO4)2(OH)2·8(H2O)
Dana No: 42.11.10.1 Strunz No: VII/D.10-50
Locality:

 

Notes:

 

 
   
 
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