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Ferrotychite

A valid IMA mineral species
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About FerrotychiteHide

Formula:
Na6(Fe,Mn,Mg)2(CO3)4(SO4)
Colour:
Gold-brown by a surface film of alteration product. On fresh surfaces, it is colorless to light yellow.
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.79
Crystal System:
Isometric
Name:
Named for being the iron analogue of tychite. The prefix "FERRO-" is from the Latin ferrum = iron, in allusion to the dominance of iron in the composition. The root name tychite is from Greek τυχή, "tyche", luck or chance.

Unique IdentifiersHide

Mindat ID:
1533
Long-form identifier:
mindat:1:1:1533:8

IMA Classification of FerrotychiteHide

Classification of FerrotychiteHide

5.BF.05

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
17.1.1.2

17 : COMPOUND CARBONATES
1 : Miscellaneous
12.2.5

12 : Carbonates with other anions
2 : Carbonates with sulphate

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
FtycIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of FerrotychiteHide

Vitreous
Colour:
Gold-brown by a surface film of alteration product. On fresh surfaces, it is colorless to light yellow.
Hardness:
Hardness:
VHN100=228 - Vickers
Fracture:
Conchoidal
Density:
2.79 g/cm3 (Measured)    2.794 g/cm3 (Calculated)

Optical Data of FerrotychiteHide

Type:
Isotropic
RI values:
n = 1.550
Surface Relief:
Low

Chemistry of FerrotychiteHide

Mindat Formula:
Na6(Fe,Mn,Mg)2(CO3)4(SO4)
Element Weights:
Element% weight
O43.705 %
Na23.550 %
Fe19.069 %
C8.202 %
S5.474 %

Calculated from ideal end-member formula.
Common Impurities:
Mn,Mg

Crystallography of FerrotychiteHide

Crystal System:
Isometric
Class (H-M):
m3(2/m3) - Diploidal
Space Group:
Fd3
Setting:
Fd3
Cell Parameters:
a = 13.962 Å
Unit Cell V:
2,721.72 ų (Calculated from Unit Cell)
Z:
8

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012463FerrotychiteMalinovskii Yu A, Baturin S V, Belov N V (1979) The crystal structure of Fe-tychite Doklady Akademii Nauk SSSR 249 1365-136819790293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.68 Å(100)
4.18 Å(90)
2.47 Å(80)
1.614 Å(60)
2.36 Å(40)
1.958 Å(40)
1.428 Å(30)
Comments:
Khibiny massif, Russia. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of FerrotychiteHide

General Appearance of Type Material:
Small grains, 0.5-1 mm, colored gold-brown by a surface film of an alteration product.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, Russia, 1301/1.
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia, 5708/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 81590.
Geological Setting of Type Material:
Alkaline rocks.
Associated Minerals at Type Locality:

Synonyms of FerrotychiteHide

Other Language Names for FerrotychiteHide

Relationship of Ferrotychite to other SpeciesHide

Other Members of Northupite Group:
ManganotychiteNa6Mn2(CO3)4(SO4)Iso. m3(2/m3) : Fd3
NorthupiteNa3Mg(CO3)2ClIso. m3(2/m3) : Fd3
TychiteNa6Mg2(CO3)4(SO4)Iso. m3(2/m3) : Fd3
Forms a series with:

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Ferrotychite associated with AnalcimeNa(AlSi2O6) · H2O

Related Minerals - Strunz-mindat GroupingHide

5.BF.05NorthupiteNa3Mg(CO3)2ClIso. m3(2/m3) : Fd3
5.BF.05ManganotychiteNa6Mn2(CO3)4(SO4)Iso. m3(2/m3) : Fd3
5.BF.05TychiteNa6Mg2(CO3)4(SO4)Iso. m3(2/m3) : Fd3
5.BF.10SidorenkiteNa3Mn2+(CO3)(PO4)Mon.
5.BF.10CrawforditeNa3Sr(CO3)(PO4)Mon. 2 : P21
5.BF.10BonshtedtiteNa3Fe2+(CO3)(PO4)Mon. 2/m : P21/m
5.BF.10BradleyiteNa3Mg(CO3)(PO4)Mon. 2/m : P21/m
5.BF.15Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2xTrig.
5.BF.20Reederite-(Y)(Na,Mn)15Y2(CO3)9(FSO3)ClHex. 6 : P6
5.BF.25Mineevite-(Y)Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2ClHex. 6/m : P63/m
5.BF.30BrianyoungiteZn3(CO3,SO4)(OH)4Mon. 2/m : P21/m
5.BF.35PhilolithitePb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4Tet. 4/mmm(4/m2/m2/m)
5.BF.40LeadhillitePb4(CO3)2(SO4)(OH)2Mon. 2/m : P21/b
5.BF.40MacphersonitePb4(CO3)2(SO4)(OH)2Orth. mmm(2/m2/m2/m)
5.BF.40SusannitePb4(CO3)2(SO4)(OH)2Trig. 3 : P3
5.BF.45Peatite-(Y)Li4Na12Y12(PO4)12(CO3)4(F,OH)8Orth. 222 : P222
5.BF.50Ramikite-(Y)Li4(Na,Ca)12Y6Zr6(PO4)12(CO3)4O4[(OH),F]4Tric. 1 : P1

Other InformationHide

IR Spectrum:
The infra-red spectrum shows absorption maxima characteristic of sulfate and carbonate.
Notes:
The mineral is readily decomposed by cold water with the formation of a fibrous brown material that is amorphous to X-rays. Strongly magnetic.
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 FerrotychiteHide

References for FerrotychiteHide

Localities for FerrotychiteHide

Showing 2 localities.

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.
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Locality ListHide

- 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.
Angola
 
  • Huambo Province
    • Bailundo
Castellano Calvo A et al. (2014)
Russia (TL)
 
  • Murmansk Oblast
    • Carbonatite Stock in the vicinity of Tul'ilukht Bay
ZVMO (1981) +1 other reference
 
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