Sideronatrite (original) (raw)
A valid IMA mineral species - grandfathered
About SideronatriteHide
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Formula:
Na2Fe(SO4)2(OH) · 3H2O
Colour:
Yellow, yellow-brown, straw-yellow, light orange; pale yellow to nearly colourless in transmitted light.
Specific Gravity:
2.22 - 2.35
Crystal System:
Orthorhombic
Name:
In allusion to the composition, containing iron (Greek "SIDEROs") and sodium (Latin "NATRIum").
A rare sodium-iron-sulphate found in arid regions in oxidized zones of iron-rich deposits. Also formed through pyrite oxidation by saline water in veins, coal deposits, and near-sea areas by sea spray.
Reversibly dehydrates to metasideronatrite depending on relative humidity and exposure to sunlight.
Two MDO polytypes are known, sideronatrite-2_O_ (MDO1) and sideronatrite-2_M_ (MDO2).
The structure of both polytypes, as in the case of metasideronatrite, is based on ferric-sulfate chains with 7 Å periodicity. Hydrogen bonding is present. In the orthorhombic polytype (at least) there are infinite octahedral-tetrahedral [Fe3+(SO4)2(OH)]2− are parallel to the c axis. Distorted corner-sharing Na octahedra, forming columns, provide a link for the chains. The Na polyhedra are set along the c axis and form sheets || (010).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3650:0
e33affc4-cfb8-4b7d-8fee-53ea8cec7806
IMA Classification of SideronatriteHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na2Fe3+(SO4)2(OH) · 3H2O
Classification of SideronatriteHide
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7.DF.20
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
31.8.3.1
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
8 : (AB)3(XO4)2Zq·xH2O
25.11.2
25 : Sulphates
11 : Sulphates of Fe and other metals
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Snat | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of SideronatriteHide
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Colour:
Yellow, yellow-brown, straw-yellow, light orange; pale yellow to nearly colourless in transmitted light.
Cleavage:
Perfect
Perfect on {010}
Fair on {100}
Comment:
Slightly flexible.
Density:
2.22 - 2.35 g/cm3 (Measured) 2.276 g/cm3 (Calculated)
Optical Data of SideronatriteHide
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RI values:
_n_α = 1.508(3) _n_β = 1.525(3) _n_γ = 1.586(3)
2V:
Calculated: 53° to 63°
δ = 0.078
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
Strong, r > v.
Optical Extinction:
X = a; Y = b; Z = c.
Comments:
X = Nearly colourless,
Y = Very pale golden yellow,
Z = Pale golden yellow.
Chemistry of SideronatriteHide
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Mindat Formula:
Na2Fe(SO4)2(OH) · 3H2O
Chemical AnalysisHide
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Crystallography of SideronatriteHide
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Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
| Sideronatrite-2M | Sideronatrite-2O |
|---|---|
| Monoclinic | Orthorhombic |
| 2/m - Prismatic | 222 - Disphenoidal |
| _P_21/b | _P_212121 |
| _P_21/a | |
| a = 20.828 Å, b = 7.265 Å, c = 7.120 Åβ = 99.84° | a = 7.265(2) Å, b = 20.522(6) Å, c = 7.120(2) Å |
| a:b:c = 2.867 : 1 : 0.98 | a:b:c = 0.354 : 1 : 0.347 |
| V 1,061.52 ų(Calculated from Unit Cell) | V 1,061.54 ų(Calculated from Unit Cell) |
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020665 | Sideronatrite | Scordari F, Ventruti G (2009) Sideronatrite, Na2Fe(SO4)2(OH)*3H2O: Crystal structure of the orthorhombic polytype and OD character analysis American Mineralogist 94 1679-1686 | 2009 | Sierra Gorda, Chile | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.15 Å | (very very strong) |
| 3.01 Å | (very strong) |
| 3.38 Å | (strong) |
| 2.68 Å | (strong) |
| 6.78 Å | (moderately strong) |
| 3.58 Å | (mderately strong) |
| 5.00 Å | (weak) |
Geological EnvironmentHide
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Geological Setting:
Secondary mineral in pyrite deposits in arid environments. Alteration of pyrite by sea spray or saline waters in metallic veins, and coal measures.
Type Occurrence of SideronatriteHide
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General Appearance of Type Material:
Elongated crystals and crystalline masses.
Place of Conservation of Type Material:
No designated type specimen.
Geological Setting of Type Material:
Oxidized zone of iron-rich deposit in very arid region.
Associated Minerals at Type Locality:
Synonyms of SideronatriteHide
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Other Language Names for SideronatriteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 7.DF. | Aldridgeite | (Cd,Ca)(Cu,Zn)4(SO4)2(OH)6 · 3H2O | Mon. 2/m : _B_2/b |
|---|---|---|---|
| 7.DF. | Chromschieffelinite | Pb10Te6+6O20(OH)14(CrO4)(H2O)5 | Orth. 222 : _C_2221 |
| 7.DF. | Alcaparrosaite | K3Ti4+Fe3+(SO4)4O(H2O)2 | Mon. 2/m : _B_2/b |
| 7.DF. | Bairdite | Pb2Cu2+4Te6+2O10(OH)2(SO4) · H2O | Mon. 2/m : _P_21/b |
| 7.DF. | Carlsonite | (NH4)5Fe3+3O(SO4)6 · 7H2O | Tric. 1 : _P_1 |
| 7.DF. | Ammoniomathesiusite | (NH4)5(UO2)4(SO4)4(VO5) · 4H2O | Tet. 4/m : _P_4/n |
| 7.DF. | Erssonite | Mg7Fe3+2(OH)18[Ca(H2O)6](SO4)2 · 12H2O | Trig. 3_m_ _(_32/m ) : _P_3_c_1 |
| 7.DF. | Flaggite | Pb4Cu2+4Te6+2(SO4)2O11(OH)2(H2O) | Tric. 1 : _P_1 |
| 7.DF. | Poellmannite | Ca6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O | Trig. 3 : _R_3 |
| 7.DF. | Haywoodite | [Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3] | Tric. 1 : _P_1 |
| 7.DF. | Cherokeeite | [Pb2Zn(OH)4](SO4) · H2O | Mon. 2/m |
| 7.DF. | Cuprocherokeeite | [Pb8Zn3Cu2+(OH)16](SO4)4 · 4H2O | Mon. 2/m |
| 7.DF. | Tzeferisite | CaZn8(SO4)2(OH)12Cl2(H2O)9 | Trig. 3_m_ _(_32/m ) : R_3_c |
| 7.DF.05 | Uklonskovite | NaMg(SO4)F · 2H2O | Mon. 2/m : _P_21/m |
| 7.DF.10 | Kainite | KMg(SO4)Cl · 3H2O | Mon. 2/m : _B_2/m |
| 7.DF.10 | Kaliochalcite | KCu2(SO4)2[(OH)(H2O)] | Mon. 2/m : _B_2/m |
| 7.DF.15 | Natrochalcite | NaCu2(SO4)2(OH) · 2H2O | Mon. 2/m : _B_2/m |
| 7.DF.17 | Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate) | Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O | Trig. 3 : _P_3 |
| 7.DF.17 | Genplesite | Ca3Sn(SO4)2(OH)6 · 3H2O | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 7.DF.20 | Metasideronatrite | Na2Fe(SO4)2(OH) · H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 7.DF.25 | Despujolsite | Ca3Mn4+(SO4)2(OH)6 · 3H2O | Hex. 6_m_2 : P_62_c |
| 7.DF.25 | Fleischerite | Pb3Ge(SO4)2(OH)6 · 3H2O | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 7.DF.25 | Schaurteite | Ca3Ge(SO4)2(OH)6 · 4H2O | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 7.DF.25 | Mallestigite | Pb3Sb5+(SO4)(AsO4)(OH)6 · 3H2O | Hex. 6 : _P_63 |
| 7.DF.30 | Slavíkite | (H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O | Trig. 3 : _R_3 |
| 7.DF.35 | Metavoltine | K2Na6Fe2+Fe3+6O2(SO4)12 · 18H2O | Trig. |
| 7.DF.40 | Lannonite | Mg2Ca4Al4(SO4)8F8 · 24H2O | Tet. 4/m : _I_4/m |
| 7.DF.40 | Vlodavetsite | AlCa2(SO4)2F2Cl · 4H2O | Tet. 4/m : _I_4/m |
| 7.DF.45 | Peretaite | Ca(SbO)4(SO4)2(OH)2 · 2H2O | Mon. 2/m : _B_2/b |
| 7.DF.50 | Gordaite | NaZn4(SO4)(OH)6Cl · 6H2O | Trig. 3 : _P_3 |
| 7.DF.50 | Calamaite | Na2TiO(SO4)2 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : I b a m |
| 7.DF.52 | Scordariite | K8(Fe3+0.67◻0.33)[Fe3+3O(SO4)6]2 · 14H2O | Trig. 3 : _R_3 |
| 7.DF.52 | Huizingite-(Al) | [(NH4)9(SO4)2][(Al,Fe3+)3(OH)2(H2O)4(SO4)6] | Tric. 1 : _P_1 |
| 7.DF.55 | Clairite | (NH4)2Fe3(SO4)4(OH)3 · 3H2O | Tric. |
| 7.DF.55 | Giacovazzoite | K5Fe3+3O(SO4)6 · 10H2O | Mon. 2/m : _P_21/b |
| 7.DF.57 | Magnanelliite | K3Fe3+2(SO4)4(OH)(H2O)2 | Mon. 2/m : _B_2/b |
| 7.DF.60 | Arzrunite | Cu4Pb2(SO4)(OH)4Cl6 · 2H2O (?) | Orth. |
| 7.DF.60 | Evdokimovite | Tl4(VO)3(SO4)5(H2O)5 | Mon. 2/m |
| 7.DF.62 | Bridgesite-(Ce) | CaCe2Cu6(SO4)4(OH)12 · 8H2O | Mon. 2/m : _B_2/m |
| 7.DF.65 | Elyite | Pb4Cu(SO4)O2(OH)4 · H2O | Mon. 2/m : _P_21/b |
| 7.DF.70 | Lautenthalite | PbCu4(SO4)2(OH)6 · 3H2O | Mon. 2/m : _P_21/b |
| 7.DF.70 | Yecoraite | Fe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O | |
| 7.DF.75 | Riomarinaite | Bi(SO4)(OH) · H2O | Mon. 2/m |
| 7.DF.80 | Dukeite | Bi3+24Cr6+8O57(OH)6 · 3H2O | Trig. 3_m_ : P_31_c |
Other InformationHide
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Notes:
Insoluble in cold water. Soluble in boiling water with separation of ferric oxide. Reversibly dehydrates to metasideronatrite, with dependence on relative humidity and sunlight exposure.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for SideronatriteHide
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References for SideronatriteHide
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Reference List:
Yang, Zhuming, Giester, Gerald, Ding, Kuishou, Li, He (2015) Crystal structure of sideronatrite-2M, Na2Fe(SO4)2(OH)(H2O)3, a new polytype from Xitieshan lead-zinc deposit, Qinghai Province, China. European Journal of Mineralogy, 27 (3) 427-432 doi:10.1127/ejm/2015/0027-2441
Localities for SideronatriteHide
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This 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.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.