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Natrojarosite Mineral Data

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General Natrojarosite Information

Help on Chemical  Formula: Chemical Formula: NaFe+++3(SO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 484.70 gm
   Sodium     4.74 %  Na    6.39 % Na2O
   Iron      34.57 %  Fe   49.42 % Fe2O3
   Hydrogen   1.25 %  H    11.15 % H2O
   Sulfur    13.23 %  S    33.04 % SO3
   Oxygen    46.21 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaFe3+3(SO4)2(OH)6
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1902
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition and similarity to Jarosite.
Help on Name Pronunciation: Name Pronunciation: Natrojarosite + Pronunciation Say NATROJAROSITE
 

Natrojarosite Image

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  Natrojarosite

Comments: Yellow brown natrojarosite crystals.
Location: Kamareza Mine, Laurium, Attiki, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Natrojarosite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.27019
Help on Cell Dimensions: Cell Dimensions: a = 7.18, c = 16.3, Z = 3; V = 727.72 Den(Calc)= 3.32
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): 5.06(1), 3.06(0.8), 3.12(0.7),
Help on Forms: Forms:

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Forms: ( 1 1 1) ( 1 1 2) ( 0 0 1)

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Physical Properties of Natrojarosite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Yellow, Ochre yellow, Ochre brown.
Help on Density: Density: 2.9 - 3.3, Average = 3.09
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5-3.5 - Finger Nail-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow
 

Optical Properties of Natrojarosite

Help on Dichroism (e): Dichroism (e): colorless, very pale yellow, or pale greenish yellow.
Help on Dichroism (w): Dichroism (w): colorless, deep golden yellow, or deep golden yellow.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.099 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.238,KPDmeas= 0.2548,KC= 0.2642
Ncalc = 1.77 - 1.88
Help on Optical Data: Optical Data: Uniaxial (-), e=1.75, w=1.83, bire=0.0800.
 

Calculated Properties of Natrojarosite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Natrojarosite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.008543976
Boson Index = 0.991456024
Help on Photoelectric: Photoelectric: PENatrojarosite = 11.13 barns/electron
U=PENatrojarosite x rElectron Density= 34.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Natrojarosite is Not Radioactive
 

Natrojarosite Classification

Help on  Dana Class: Dana Class: 30.02.05.02 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.02)where (A B)2 XO4 Zq
  (30.02.05)Alunite Group (Jarosite Subgroup)
 
30.02.05.01 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
30.02.05.02 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
30.02.05.03 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
30.02.05.04 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
30.02.05.05 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
30.02.05.06 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
30.02.05.07 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 
30.02.05.08 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 07.BC.10 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
 
07.BC.10 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
07.BC.10 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
07.BC.10 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
07.BC.10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 

Other Natrojarosite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Natrojarosite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Natrojarosite

NaFe+++3(SO4)2(OH)6
Dana No: 30.02.05.02 Strunz No: 07.BC.10
Locality:

 

Notes:

 

 
   
 


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