Ferrotychite Mineral Data

General Ferrotychite Information

Chemical Formula:

Na6Fe++2(SO4)(CO3)4

Composition:

Molecular Weight = 585.73 gm

Sodium 23.55 % Na 31.74 % Na₂O

Iron 19.07 % Fe 24.53 % FeO

Carbon 8.20 % C 30.05 % CO₂

Sulfur 5.47 % S 13.67 % SO₃

Oxygen 43.70 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₆Fe²⁺₂(SO₄)(CO₃)₄

Environment:

Constituent of a vein cutting ijolite-urtite in an alkaline igneous complex, from a drill core.

IMA Status:

Approved IMA 1981

Locality:

Olenii Ruchei (Reindeerï¿½s Stream), Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the essential FERROus iron and the relation to tychite.

Name Pronunciation:

Ferrotychite + Pronunciation

Synonym:

ICSD 20169

PDF 35-707

Ferrotychite Image

Images:

Ferrotychite

Comments: Yellow crystalline granular ferrotychite in white analcime (drill core).
Location: Olenii Ruchei, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrotychite Crystallography

Cell Dimensions:

a = 13.962, Z = 8; V = 2,721.72 Den(Calc)= 2.86

Crystal System:

Isometric - Diploidal H-M Symbol (2/m 3) Space Group: F d3

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

By Intensity(I/I_o): 2.68(1), 4.18(0.9), 2.47(0.8),

Physical Properties of Ferrotychite

Cleavage:

None

Color:

Colorless, Light yellow.

Density:

2.79

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ferrotychite

Gladstone-Dale:

CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1923,KPDmeas= 0.1971,KC= 0.194
Ncalc = 1.54 - 1.55

Optical Data:

Isotropic, n=1.55.

Calculated Properties of Ferrotychite

Electron Density:

Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Ferrotychite =2.86 gm/cc.

Fermion Index:

Fermion Index = 0.0055652783
Boson Index = 0.9944347217

Photoelectric:

PE_Ferrotychite= 6.48 barns/electron
U=PE_Ferrotychite x rElectron Density= 18.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrotychite is Not Radioactive

Ferrotychite Classification

Dana Class:

17.01.01.02 (17)Compound Carbonates

(17.01)with miscellaneous formulae

(17.01.01)Tychite Group

17.01.01.01 Tychite Na6Mg2(CO3)4(SO4) F d3 2/m 3

17.01.01.02 Ferrotychite Na6Fe2(SO4)(CO3)4 F d3 2/m 3

17.01.01.03 Manganotychite Na6(Mn,Fe,Mg)2(SO4)(CO3)4 F d3 2/m 3

Strunz Class:

05.BF.05 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.05 Ferrotychite Na6Fe2(SO4)(CO3)4 F d3 2/m 3

05.BF.05 Manganotychite Na6(Mn,Fe,Mg)2(SO4)(CO3)4 F d3 2/m 3

05.BF.05 Northupite Na3Mg(CO3)2Cl F d3 2/m 3

05.BF.05 Tychite Na6Mg2(CO3)4(SO4) F d3 2/m 3

Other Ferrotychite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferrotychite :
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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Ferrotychite

Na6Fe++2(SO4)(CO3)4
Dana No: 17.01.01.02 Strunz No: 05.BF.05
Locality:

Notes:

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