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Natrojarosite

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Formula:
NaFe3(SO4)2(OH)6
System:
Trigonal
Colour:
Yellow, golden brown, ...
Hardness:
2½ - 3½
Name:
In allusion to its composition with dominant sodium (NATRium) and its relationship to JAROSITE.
Desborough et al. (2010) showed there is only limited solid solution between jarosite and natrojarosite at low temperatures.

Synthetic samples may be monoclinic-pseudorhombohedral (Grey et al., 2010).


Classification of Natrojarosite

Approved, 'Grandfathered' (first described prior to 1959)
7.BC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
25.11.1

25 : Sulphates
11 : Sulphates of Fe and other metals

Type Occurrence of Natrojarosite

Physical Properties of Natrojarosite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Yellow, golden brown, red-brown
Hardness (Mohs):
2½ - 3½
Tenacity:
Brittle
Cleavage:
Perfect
On {0001}, perfect.
Fracture:
Conchoidal
Density:
3.18 g/cm3 (Measured)    3.29 g/cm3 (Calculated)

Crystallography of Natrojarosite

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 7.33Å, c = 16.74Å
Ratio:
a:c = 1 : 2.284
Unit Cell Volume:
V 778.92 ų (Calculated from Unit Cell)
Morphology:
Crusts comprised of minute scaly crystals; earthy masses; pulverulent. Crystals pseudo-cubic {01_12} or flattened {0001} with an hexagonal outline.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Natrojarosite

Type:
Uniaxial (-)
RI values:
nω = 1.830 nε = 1.750
Max Birefringence:
δ = 0.080
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Visible
Comments:
Dichroic:
O = Light yellow
E = nearly Colourless

Chemical Properties of Natrojarosite

Formula:
NaFe3(SO4)2(OH)6
All elements listed in formula:

Relationship of Natrojarosite to other Species

Series:
Forms a series with Jarosite (see here)
Other Members of Group:
AluniteKAl3(SO4)2(OH)6
Ammonioalunite(NH4)Al3(SO4)2(OH)6
Ammoniojarosite(NH4)Fe33+(SO4)2(OH)6
ArgentojarositeAgFe33+(SO4)2(OH)6
Beaverite-(Cu)Pb(Fe23+Cu)(SO4)2(OH)6
Beaverite-(Zn)Pb(Fe23+Zn)(SO4)2(OH)6
DorallchariteTlFe33+(SO4)2(OH)6
HuangiteCa0.5Al3(SO4)2(OH)6
Hydroniumjarosite(H3O)Fe33+(SO4)2(OH)6
JarositeKFe3+ 3(SO4)2(OH)6
NatroaluniteNaAl3(SO4)2(OH)6
Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6
OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6
PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Schlossmacherite(H3O)Al3(SO4)2(OH)6
WalthieriteBa0.5Al3(SO4)2(OH)6
7.BC.05D'AnsiteNa21Mg(SO4)10Cl3
7.BC.10AluniteKAl3(SO4)2(OH)6
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6
7.BC.10Ammoniojarosite(NH4)Fe33+(SO4)2(OH)6
7.BC.10ArgentojarositeAgFe33+(SO4)2(OH)6
7.BC.10Beaverite-(Cu)Pb(Fe23+Cu)(SO4)2(OH)6
7.BC.10DorallchariteTlFe33+(SO4)2(OH)6
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6
7.BC.10Hydroniumjarosite(H3O)Fe33+(SO4)2(OH)6
7.BC.10JarositeKFe3+ 3(SO4)2(OH)6
7.BC.10Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6
7.BC.10PlumbojarositePb0.5Fe33+(SO4)2(OH)6
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6
7.BC.10WalthieriteBa0.5Al3(SO4)2(OH)6
7.BC.10Beaverite-(Zn)Pb(Fe23+Zn)(SO4)2(OH)6
7.BC.15Ye'elimiteCa4Al6(SO4)O12
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3Cl
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OCl
7.BC.25ChlorothioniteK2Cu(SO4)Cl2
7.BC.30EuchlorineKNaCu3(SO4)3O
7.BC.30FedotoviteK2Cu3(SO4)3O
7.BC.35KamchatkiteKCu3(SO4)2OCl
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)Cl
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2
7.BC.65LinaritePbCu(SO4)(OH)2
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4
7.BC.70ChenitePb4Cu(SO4)2(OH)6
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)
7.BC.80AnhydrokainiteKMg(SO4)Cl
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2O
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2O
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2O
25.11.5AmarilliteNaFe(SO4)2 · 6H2O
25.11.6YavapaiiteKFe(SO4)2
25.11.7KrausiteKFe(SO4)2 · H2O
25.11.8GoldichiteKFe(SO4)2 · 4H2O
25.11.9JarositeKFe3+ 3(SO4)2(OH)6
25.11.10VoltaiteK2Fe52+Fe33+Al(SO4)12 · 18H2O
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2O
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
25.11.13Sabieite(NH4)Fe3+(SO4)2
25.11.14Ammoniojarosite(NH4)Fe33+(SO4)2(OH)6
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2O
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2O
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2O
25.11.18Godovikovite(NH4)Al(SO4)2
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2O
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
25.11.24Millosevichite(Al,Fe)2(SO4)3
25.11.25AluminocopiapiteAl2/3Fe43+(SO4)6(OH)2 · 20H2O
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2O
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2O
25.11.29ZincovoltaiteK2Zn5Fe33+Al(SO4)12 · 18H2O

Other Names for Natrojarosite

Name in Other Languages:

Other Information

Other Information:
Slowly soluble in HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Natrojarosite

Reference List:
Penfield and Hillebrand (1902) American Journal of Science: 14: 211.

Cesàro (1905) Académie royale des sciences de Belgique, Brussels - Bull.: 138.

Koenig (1912) Journal of the Academy of Science, Philadelphia: 15: 425.

Simpson and Brown (1916) Journal of the Royal Society of Western Australia: 1: 45.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679.

Doelter, C. (1927) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 4 [2]: 589.

Shannon and Gonyer (1927) Journal of the Washington Academy of Sciences: 17: 536.

Hintze, Carl (1929) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3B]: 4202.

Hendricks (1937) American Mineralogist: 22: 773.

Bandy (1938) American Mineralogist: 23: 669.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 563-564.

Neues Jahrbuch für Mineralogie, Monatshefte (1976): 406.

Drouet, C. and Navrotsky, A. (2003) Synthesis, characterization, and thermochemistry of K-Na-H3O jarosites. Geochimica et Cosmochimica Acta: 67: 2063-2076.

Papike, J. J.; Burger, P. V.; Karner, J. M.; Shearer, C. K.; Lueth, V. W. (2007): Terrestrial analogs of martian jarosites: Major, minor element systematics and Na-K zoning in selected samples. American Mineralogist 92, 444-447.

Desborough, G. A., Smith, K. S., Lowers, H. A., Swayze, G. A., Hammarstrom, J. M., Diehl, S. F., Leinz, R. W. and Driscoll, R. L. (2010): Mineralogical and chemical characteristics of some natural jarosites. Geochimica et Cosmochimica Acta, 74, 1041-1056.

Grey, I.E., Scarlett, N.N.V. & Brand, H.E.A. (2010): Ordering of iron vacancies in monoclinic jarosites. American Mineralogist, 95, 1590-1593. [synth. samples]

I. E. Grey, N. V. Y. Scarlett, P. Bordet, and H. E. A. Brand (2011): Jarosite–butlerite intergrowths in non-stoichiometric jarosites: crystal chemistry of monoclinic natrojarosite–hydroniumjarosite phases. Mineral. Mag. 75, 2775-2791.

H. E. A. Brand, N. V. Y. Scarlett, I. E. Grey, R. B. Knott and N. Kirby (2013): In situ SAXS studies of the formation of sodium jarosite. J. Synchrotron Rad. 20, 626-634.

Nestola, F., Mills, S.J., Periotto, B., Scandolo, L. (2013): The alunite supergroup under high pressure: the case of natrojarosite, NaFe3(SO4)2(OH)6. Mineral. Mag. 77, 3007-3017.

Najorka, J., Lewis, J.M.T., Spratt, J., Sephton, M.A. (2016): Single-crystal X-ray diffraction study of synthetic sodium–hydronium jarosite. Physics and Chemistry of Minerals 43, 377-386.

Internet Links for Natrojarosite

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http://www.mindat.org/min-2856.html
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Localities for Natrojarosite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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