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Sideronatrite Mineral Data

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General Sideronatrite Information

Help on Chemical  Formula: Chemical Formula: Na2Fe+++(SO4)2(OH)•3(H2O)
Help on Composition: Composition: Molecular Weight = 365.01 gm
   Sodium    12.60 %  Na   16.98 % Na2O
   Iron      15.30 %  Fe   21.88 % Fe2O3
   Hydrogen   1.93 %  H    17.27 % H2O
   Sulfur    17.57 %  S    43.87 % SO3
   Oxygen    52.60 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Fe3+(SO4)2(OH)•3(H2O)
Help on Environment: Environment: Secondary mineral found in arid regions.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: San Simon mine, Huantajaya, Tarapaca, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its composition.
Help on Name Pronunciation: Name Pronunciation: Sideronatrite + Pronunciation Say SIDERONATRITE
Help on Synonym: Synonym: Urusite

Sideronatrite Image

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Comments: Golden yellow acicular sprays of sideronatrite crystals on matrix.
Location: Sulfur pit, Crescent Valley, Nevada, USA. Scale: 6 x 5 x 4 cm.
© John Veevaert

Sideronatrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3546:1:0.3487
Help on Cell Dimensions: Cell Dimensions: a = 7.27, b = 20.5, c = 7.15, Z = 4; V = 1,065.60 Den(Calc)= 2.28
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.2(1), 3.01(0.8), 3.38(0.6),

Physical Properties of Sideronatrite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Yellow, Yellow, Yellow brown, Pale orange.
Help on Density: Density: 2 - 2.5, Average = 2.25
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: pale yellow

Optical Properties of Sideronatrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2367,KPDmeas= 0.2399,KC= 0.2376
Ncalc = 1.48 - 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.508, b=1.525, g=1.586, bire=0.0780, 2V(Calc)=58, 2V(Meas)=58. Dispersion r > v strong.
Help on Pleochroism (x): Pleochroism (x): nearly colorless.
Help on Pleochroism (y): Pleochroism (y): pale amber yellow.
Help on Pleochroism (z): Pleochroism (z): pale yellow.

Calculated Properties of Sideronatrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Sideronatrite =2.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.004816789
Boson Index = 0.995183211
Help on Photoelectric: Photoelectric: PESideronatrite = 5.76 barns/electron
U=PESideronatrite x rElectron Density= 13.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sideronatrite is Not Radioactive

Sideronatrite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.08)where (A+ B++)3 (XO4)2 Zq�x(H2O)
  (31.08.03)Dana Group Sideronatrite Na2Fe(SO4)2(OH)•3(H2O) Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.DF.20 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.20 Metasideronatrite Na2Fe(SO4)2(OH)•(H2O) Pbnm or Pbn21 Ortho
07.DF.20 Sideronatrite Na2Fe(SO4)2(OH)•3(H2O) Pbnm 2/m 2/m 2/m

Other Sideronatrite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Sideronatrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.DF.20





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