Jarosite Mineral Data + Say JAROSITE


General Jarosite Information
Help on Chemical Formula: Chemical Formula: KFe+++3(SO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 500.81 gm
   Potassium   7.81 %  K     9.40 % K2O
   Iron       33.45 %  Fe   47.83 % Fe2O3
   Hydrogen    1.21 %  H    10.79 % H2O
   Sulfur     12.81 %  S    31.97 % SO3
   Oxygen     44.73 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KFe3+3(SO4)2(OH)6
Help on Environment: Environment: Secondary mineral, forming under conditions of weathering in arid climates.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1852
Help on Locality: Locality: Barranco Jaroso in southern Spain. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Synonym: Synonym: ICSD 12107
  PDF 36-427
  Utahite
 

Jarosite Image

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Jarosite   Alunogen

Comments: Colorless to white, tabular crystals alunogen on reddish jarosite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag
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Jarosite   Fairbankite

Comments: Colorless to white crystals of fairbankite with orangish brown jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag
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Jarosite

Comments: Deep brown lustrous crystals of Jarosite to 2 mm.
Location: Soureza, Attika, Greece. Scale: 2.8 x 1.6 cm.
© John Veevaert
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Jarosite   Winstanleyite

Comments: Small, yellow octahedral crystal of winstanleyite on brownish red jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 0.9 mm.
© Thomas Witzke / Abraxas-Verlag

Jarosite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.36199
Help on Cell Dimensions: Cell Dimensions: a = 7.21, c = 17.03, Z = 3; V = 766.68 Den(Calc)= 3.25
Help on Crystal System: Crystal System: Trigonal - PyramidalH-M Symbol (3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.08(1), 3.11(0.6), 2.292(0.5),
Help on Forms: Forms:

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Forms: [ 1 1 1] [ 1 1 2] [ 0 0 1]

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Becker U , Gasharova B , Physics and Chemistry of Minerals , 28 (2001) p.545-556, AFM observations and simulations of jarosite growth at the molecular scale:, probing the basis for the incorporation of foreign ions into jarosite, as a storage mineral

 

Physical Properties of Jarosite

Help on Cleavage: Cleavage: [0001] Distinct
Help on Color: Color: Brown, Yellow, Yellow brown, Light yellow.
Help on Density: Density: 2.9 - 3.3, Average = 3.09
Help on Diaphaniety: Diaphaniety: 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: None.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow
 

Optical Properties of Jarosite

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= 0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.102 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2356,KPDmeas= 0.247,KC= 0.2624
Help on Optical Data: Optical Data: Uniaxial (-), e=1.713-1.715, w=1.815-1.82, bire=0.1020-0.1050.
 

Calculated Properties of Jarosite

Help on Electron Density: Electron Density:

relectron=3.06 gm/cc
note: rJarosite =3.10 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00827
Boson Index = 0.99173
Help on Photoelectric: Photoelectric:

PEJarosite = 11.47 barns/electron
U=PEJarosite x relectron= 35.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 111.13 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Jarosite - barely detectable

 

Jarosite Classification
Help on Dana Class: Dana Class: 30.2.5.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.2)where (A B)2 XO4 Zq
  (30.2.5)Alunite Group (Jarosite Subgroup)
 
30.2.5.1 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
30.2.5.2 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
30.2.5.3 Hydronium-jarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
30.2.5.4 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
30.2.5.5 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
30.2.5.6 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
30.2.5.7 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 
30.2.5.8 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: VI/B.11-60 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations
  VI/B.11 - Alunite group, Natroalunite - Jarosite - Beaverite
 
VI/B.11-10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-20 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
VI/B.11-30 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-40 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-43 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-45 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-50 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
VI/B.11-60 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
VI/B.11-65 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
 
VI/B.11-70 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
VI/B.11-80 Hydronium-jarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
VI/B.11-90 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
VI/B.11-100 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
VI/B.11-110 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
VI/B.11-120 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 

Other Jarosite 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 Jarosite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 -Athena 6 - CalTech Mineral Spectroscopy 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (UofA) 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 - Mineral and Gemstone Kingdom 16 -Mineralienatlas (Deutsch) 17 - Minerals of Wisconsin 18 -QUT Mineral Atlas 19 - WWW-MINCRYST 20 -École des Mines de Paris

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Print or Cut-and-Paste your Jarosite Specimen Label here :

Jarosite

KFe+++3(SO4)2(OH)6
Dana No: 30.2.5.1 Strunz No: VI/B.11-60
Locality:

 

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