Pseudolaueite Mineral Data + Say PSEUDOLAUEITE

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General Pseudolaueite Information

Help on Chemical  Formula: Chemical Formula: Mn++Fe+++2(PO4)2(OH)2·7-8(H2O)
Help on Composition: Composition: Molecular Weight = 516.70 gm
   Manganese   10.63 %  Mn   13.73 % MnO
   Iron        21.62 %  Fe   30.91 % Fe2O3
   Phosphorus  11.99 %  P    27.47 % P2O5
   Hydrogen     3.12 %  H    27.89 % H2O
   Oxygen      52.64 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Fe3+2(PO4)2(OH)2·7(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 15205
  PDF 12-294
 

Pseudolaueite Image

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Pseudolaueite

Comments: Brownish yellow crystals of pseudolaueite.
Location: Hagendorf, Bavaria, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Pseudolaueite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2987:1:1.3723
Help on Cell Dimensions: Cell Dimensions: a = 9.647, b = 7.428, c = 10.194, Z = 2; beta = 104.63° V = 706.80 Den(Calc)= 2.43
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.926(1), 5.869(0.7), 3.472(0.4),
Click Here for Large Pseudolaueite Structure Window Crystal Structure:

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Baur W H , American Mineralogist , 54 (1969) p.1312-1323, A comparison of the crystal structures of pseudolaueite and laueite

 

Physical Properties of Pseudolaueite

Help on Color: Color: Orange.
Help on Density: Density: 2.463
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Pseudolaueite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2691,KPDmeas= 0.2655,KC= 0.2695
Help on Optical Data: Optical Data: Biaxial (+), a=1.626, b=1.65, g=1.686, bire=0.0600, 2V(Calc)=80, 2V(Meas)=80.
 

Calculated Properties of Pseudolaueite

Help on Electron Density: Electron Density:

relectron=2.44 gm/cc
note: rPseudolaueite =2.43 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00484
Boson Index = 0.99516
Help on Photoelectric: Photoelectric:

PEPseudolaueite = 9.56 barns/electron
U=PEPseudolaueite x relectron= 23.29 barns/cc.

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

Pseudolaueite is Not Radioactive

 

Pseudolaueite Classification

Help on  Dana Class: Dana Class: 42.11.10.3 (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.09-40 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
  VII/D.09 - Vauxite - Pseudolaueite series
 
VII/D.09-10 Vauxite FeAl2(PO4)2(OH)2·6(H2O) P1 1
 
VII/D.09-20 Metavauxite FeAl2(PO4)2(OH)2·8(H2O) P 21/c 2/m
 
VII/D.09-25 Kastningite! (Mn,Fe,Mg)Al2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.09-30 Stewartite MnFe2(PO4)2(OH)2·8(H2O) P1 1
 
VII/D.09-40 Pseudolaueite MnFe2(PO4)2(OH)2·7-8(H2O) P 21/a 2/m
 

Other Pseudolaueite Information

Help on References: References: 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 Pseudolaueite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Pseudolaueite

Mn++Fe+++2(PO4)2(OH)2·7-8(H2O)
Dana No: 42.11.10.3 Strunz No: VII/D.09-40
Locality:

 

Notes:

 

 
   
 
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