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Natrodufrenite Mineral Data

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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.
Help on Name Pronunciation: Name Pronunciation: Natrodufrenite + Pronunciation Say NATRODUFRENITE

Natrodufrenite Image

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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 - Prismatic H-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 Diaphaneity: Diaphaneity: 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= 0.123 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2485,KPDmeas= 0.237,KC= 0.2703
Ncalc = 1.83 - 1.87
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: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Natrodufrenite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0075166155
Boson Index = 0.9924833845
Help on Photoelectric: Photoelectric: PENatrodufrenite = 11.07 barns/electron
U=PENatrodufrenite x rElectron Density= 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)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.01)Burangaite Group Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12•4(H2O) C 2/c 2/m Dufrenite FeFe4(PO4)3(OH)5•2(H2O) C 2/c 2/m Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6•2(H2O) C 2/c 2/m IMA2008-056! NaMnFe5(PO4)4(OH)6•2H2O C 2/c 2/m Matioliite! NaMgAl5(PO4)4(OH)6•2H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DK.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
08.DK.15 Dufrenite FeFe4(PO4)3(OH)5•2(H2O) C 2/c 2/m
08.DK.15 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12•4(H2O) C 2/c 2/m
08.DK.15 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6•2(H2O) C 2/c 2/m
08.DK.15 Matioliite! NaMgAl5(PO4)4(OH)6•2H2O C 2/c 2/m
08.DK.15 IMA2008-056! NaMnFe5(PO4)4(OH)6•2H2O C 2/c 2/m

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 - 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.DK.15





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