Natrodufrenite Mineral Data + Say NATRODUFRENITE

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General Natrodufrenite Information

Help on Chemical  Formula: Chemical Formula: Na(Fe+++,Fe++)(Fe+++,Al)5(PO4)4(OH)6·2(H2O)
Help on Composition: Composition: Molecular Weight = 786.50 gm
   Sodium       1.75 %  Na    2.36 % Na2O
   Aluminum     3.09 %  Al    5.83 % Al2O3
   Iron        34.44 %  Fe    0.46 % FeO / 48.73 % Fe2O3
   Phosphorus  14.97 %  P    34.29 % P2O5
   Hydrogen     1.20 %  H    10.77 % H2O
   Oxygen      44.55 %  O
              ______        ______ 
              100.00 %      102.44 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.6Fe3+0.7Fe2+0.05Fe3+4.1Al0.9(PO4)3.8(OH)4(H2O)2.7
Help on Environment: Environment: Low-temperature secondary mineral.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Rochefort-en-Terre, Morbihan, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the essential sodium, (NATRium) and its relationship to dufrenite.
 

Natrodufrenite Image

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Natrodufrenite

Comments: Greenish gray, botryoidal aggregates natrodufrenite on hematite-stained quartz.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Natrodufrenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =5.0155:1:2.6644
Help on Cell Dimensions: Cell Dimensions: a = 25.83, b = 5.15, c = 13.722, Z = 4; beta = 111.533° V = 1,697.96 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.152(1), 3.4(0.8), 12.04(0.8),
 

Physical Properties of Natrodufrenite

Help on Color: Color: Light blue green.
Help on Density: Density: 3.23
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5-4.5 - Between Copper Penny and Fluorite-Apatite
Help on Luster: Luster: Silky
Help on Streak: Streak: green
 

Optical Properties of Natrodufrenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.12 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2485,KPDmeas= 0.237,KC= 0.2694
Help on Optical Data: Optical Data: Biaxial (?), a=1.756, g=1.775, bire=0.0190
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (z): Pleochroism (z): dark green.
 

Calculated Properties of Natrodufrenite

Help on Electron Density: Electron Density:

relectron=3.02 gm/cc
note: rNatrodufrenite =3.08 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00751
Boson Index = 0.99249
Help on Photoelectric: Photoelectric:

PENatrodufrenite = 11.07 barns/electron
U=PENatrodufrenite x relectron= 33.48 barns/cc.

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

Natrodufrenite is Not Radioactive

 

Natrodufrenite Classification

Help on  Dana Class: Dana Class: 42.9.1.3 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.9)where (A)3 (XO4)2 Zq · x(H2O)
  (42.9.1)Dana Group
 
42.9.1.1 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m
 
42.9.1.2 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m
 
42.9.1.3 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: VII/D.11-130 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
  VII/D.11 - Strunzite series
 
VII/D.11-10 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri
 
VII/D.11-20 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1
 
VII/D.11-30 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri
 
VII/D.11-40 Bermanite MnMn2(PO4)2(OH)2·4(H2O) P 21 2
 
VII/D.11-50 Cacoxenite (Fe,Al)25(PO4)17O6(OH)12·75(H2O) P 6/mmm 6/m 2/m 2/m
 
VII/D.11-60 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1
 
VII/D.11-70 Beraunite FeFe5(PO4)4(OH)5·4(H2O) C 2/c 2/m
 
VII/D.11-71 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4·6(H2O) Mono
 
VII/D.11-90 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri
 
VII/D.11-100 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri
 
VII/D.11-110 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m
 
VII/D.11-120 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m
 
VII/D.11-130 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m
 
VII/D.11-135 Ercitite! Na(Mn,Fe)(PO4)(OH)·2(H2O) P 21/n 2/m
 
VII/D.11-140 Kidwellite Na(Fe,Cu)9x(PO4)6(OH)11·3(H2O) P 2/c 2/m
 
VII/D.11-150 Meurigite! KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono
 

Other Natrodufrenite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Natrodufrenite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Natrodufrenite

Na(Fe+++,Fe++)(Fe+++,Al)5(PO4)4(OH)6·2(H2O)
Dana No: 42.9.1.3 Strunz No: VII/D.11-130
Locality:

 

Notes:

 

 
   
 
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