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Natrojarosite Mineral Data |
General Natrojarosite Information |
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NaFe+++3(SO4)2(OH)6 | ||
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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 | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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NaFe3+3(SO4)2(OH)6 | ||
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Valid Species (Pre-IMA) 1902 | ||
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Link to MinDat.org Location Data. | ||
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Named after its chemical composition and similarity to Jarosite. | ||
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Natrojarosite + Pronunciation ![]() |
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Natrojarosite Image | |||
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Natrojarosite Crystallography |
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a:c = 1:2.27019 | ||
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a = 7.18, c = 16.3, Z = 3; V = 727.72 Den(Calc)= 3.32 | ||
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Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m | ||
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By Intensity(I/Io): 5.06(1), 3.06(0.8), 3.12(0.7), | ||
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Physical Properties of Natrojarosite |
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{0001} Perfect | ||
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Yellow, Ochre yellow, Ochre brown. | ||
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2.9 - 3.3, Average = 3.09 | ||
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Transparent to Translucent | ||
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Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | ||
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Crystalline - Fine - Occurs as well-formed fine sized crystals. | ||
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Fibrous - Crystals made up of fibers. | ||
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Massive - Uniformly indistinguishable crystals forming large masses. | ||
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2.5-3.5 - Finger Nail-Copper Penny | ||
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Non-fluorescent. | ||
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Vitreous (Glassy) | ||
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light yellow | ||
Optical Properties of Natrojarosite |
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colorless, very pale yellow, or pale greenish yellow. | ||
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colorless, deep golden yellow, or deep golden yellow. | ||
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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 |
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Uniaxial (-), e=1.75, w=1.83, bire=0.0800. | ||
Calculated Properties of Natrojarosite |
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Bulk Density (Electron Density)=3.06 gm/cc note: Specific Gravity of Natrojarosite =3.10 gm/cc. |
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Fermion Index = 0.008543976 Boson Index = 0.991456024 |
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PENatrojarosite = 11.13 barns/electron U=PENatrojarosite x rElectron Density= 34.01 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Natrojarosite is Not Radioactive |
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Natrojarosite Classification |
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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) | |||
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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 | |||
Other Natrojarosite Information |
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NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | ||
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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 Search for Natrojarosite using: Visit our Advertisers for Natrojarosite : Ask about Natrojarosite here : Print or Cut-and-Paste your Natrojarosite Specimen Label here :
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