Ferrotychite Mineral Data

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

IMA Status:

Approved IMA 1981

Locality:

Link to MinDat.org Location Data.

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 - DiploidalH-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),

Crystal Structure:

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Malinovskii Yu A , Baturin S V , Belov N V , Doklady Akademii Nauk SSSR , 249 (1979) p.1365-1368, The crystal structure of Fe-tychite

Physical Properties of Ferrotychite

Cleavage:

None

Color:

Colorless, Light yellow.

Density:

2.79

Diaphaniety:

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

Optical Data:

Isotropic, n=1.55.

Calculated Properties of Ferrotychite

Electron Density:

r_electron=2.79 gm/cc
note: r_Ferrotychite=2.86 gm/cc.

Fermion Index

Fermion Index = 0.00556
Boson Index = 0.99444

Photoelectric:

PE_Ferrotychite= 6.48 barns/electron
U=PE_Ferrotychite x r_electron= 18.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferrotychite is Not Radioactive

Ferrotychite Classification

Dana Class:

17.1.1.2 (17)Compound Carbonates

(17.1)with miscellaneous formulae

(17.1.1)Dana Group

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

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

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

Strunz Class:

V/C.03-30 V - Nitrates, Carbonates and Borates

V/C - Waterfree carbonates with unfamiliar anions

V/C.03 - Northupite - Ferrotychite series

V/C.03-10 Northupite Na3Mg(CO3)2Cl F d3 2/m 3

V/C.03-20 Tychite Na6Mg2(CO3)4(SO4) F d3 2/m 3

V/C.03-25 Manganotychite Na6(Mn,Fe,Mg)2(SO4)(CO3)4 F d3 2/m 3

V/C.03-30 Ferrotychite Na6Fe2(SO4)(CO3)4 F d3 2/m 3

Other Ferrotychite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Ferrotychite

Na6Fe++2(SO4)(CO3)4
Dana No: 17.1.1.2 Strunz No: V/C.03-30
Locality:

Notes: