Ferrinatrite Mineral Data

Ferrinatrite Mineral Data +

General Ferrinatrite Information

Chemical Formula:

Na3Fe+++(SO4)3·3(H2O)

Composition:

Molecular Weight = 501.07 gm

Sodium 13.76 % Na 18.55 % Na₂O

Iron 11.15 % Fe 15.94 % Fe₂O₃

Hydrogen 1.61 % H 14.38 % H₂O

Sulfur 19.20 % S 47.94 % SO₃

Oxygen 54.28 % O

______ ______

100.00 % 96.81 % = TOTAL OXIDE

Empirical Formula:

Na₃Fe³⁺(SO₄)₃(OH)₂·3(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1889

Locality:

Mina la Compania, Sierra Gorda, Atacama Desert, Chile Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition of FERRIc iron and NATRIum (Sodium).

Synonym:

ICSD 14003

PDF 41-609

Ferrinatrite Image

Images:

Ferrinatrite

Comments: White spherical aggregates of ferrinatrite with gypsum needles.
Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Ferrinatrite Rozenite Copiapite

Comments: White powdery rozenite coating with yellow ferrinatrite on purple copiapite.
Location: Le Cetine Mine, Siena, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrinatrite Crystallography

Axial Ratios:

a:c = 1:0.55684

Cell Dimensions:

a = 15.57, c = 8.67, Z = 6; V = 1,820.23 Den(Calc)= 2.74

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.8(1), 2.91(0.8), 4.38(0.6),

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Crystal Structure:

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Scordari F , Mineralogical Magazine , 41 (1977) p.375-383, The crystal structure of ferrinatrite, Na3(H2O)3[Fe(SO4)3] and its relationship, to Maus s salt, (H3O)2K2{K0.5(H2O)0.5}6[Fe3O(H2O)3(SO4)6](OH)2, Locality: Sierra Gorda, Chile

Physical Properties of Ferrinatrite

Cleavage:

[1010] Perfect, [0001] Distinct

Color:

White, Pale green, Bluish green, Purplish, Colorless.

Density:

2.55 - 2.56, Average = 2.55

Diaphaniety:

Transparent

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ferrinatrite

Gladstone-Dale:

CI meas= -0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2164,KPDmeas= 0.2321,KC= 0.2192

Optical Data:

Uniaxial (+), w=1.559, e=1.627, bire=0.0680.

Calculated Properties of Ferrinatrite

Electron Density:

r_electron=2.75 gm/cc
note: r_Ferrinatrite=2.74 gm/cc.

Fermion Index

Fermion Index = 0.00406
Boson Index = 0.99594

Photoelectric:

PE_Ferrinatrite= 4.67 barns/electron
U=PE_Ferrinatrite x r_electron= 12.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferrinatrite is Not Radioactive

Ferrinatrite Classification

Dana Class:

29.4.4.1 (29)Hydrated Acid and Sulfates

(29.4)where (A+)2 Bn (XO4)p · x(H2O)

(29.4.4)Dana Group

29.4.4.1 Ferrinatrite Na3Fe(SO4)3·3(H2O) P 3 3

Strunz Class:

VI/C.16-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size

VI/C.16 - Kröhnkite - Goldichite series

VI/C.16-10 Krohnkite Na2Cu(SO4)2·2(H2O) P 2₁/c 2/m

VI/C.16-20 Ferrinatrite Na3Fe(SO4)3·3(H2O) P 3 3

VI/C.16-30 Goldichite KFe(SO4)2·4(H2O) P 2₁/c 2/m

Other Ferrinatrite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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

Ferrinatrite

Na3Fe+++(SO4)3·3(H2O)
Dana No: 29.4.4.1 Strunz No: VI/C.16-20
Locality:

Notes: