Ferrotychite
A valid IMA mineral species
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About Ferrotychite
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
Member of:
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 Identifiers
Mindat ID:
1533
Long-form identifier:
mindat:1:1:1533:8
IMA Classification of Ferrotychite
Approved
IMA Formula:
Na6Fe2+2(CO3)4(S6+O4)
Approval year:
1980
First published:
1981
Classification of Ferrotychite
5.BF.05
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
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
17 : COMPOUND CARBONATES
1 : Miscellaneous
12.2.5
12 : Carbonates with other anions
2 : Carbonates with sulphate
12 : Carbonates with other anions
2 : Carbonates with sulphate
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Ftyc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ferrotychite
Vitreous
Colour:
Gold-brown by a surface film of alteration product. On fresh surfaces, it is colorless to light yellow.
Hardness:
4 on Mohs scale
Hardness:
VHN100=228 - Vickers
Fracture:
Conchoidal
Density:
2.79 g/cm3 (Measured) 2.794 g/cm3 (Calculated)
Optical Data of Ferrotychite
Type:
Isotropic
RI values:
n = 1.550
Surface Relief:
Low
Chemistry of Ferrotychite
Mindat Formula:
Na6(Fe,Mn,Mg)2(CO3)4(SO4)
Element Weights:
Common Impurities:
Mn,Mg
Crystallography of Ferrotychite
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 Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012463 | Ferrotychite | Malinovskii Yu A, Baturin S V, Belov N V (1979) The crystal structure of Fe-tychite Doklady Akademii Nauk SSSR 249 1365-1368 | 1979 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Ferrotychite
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.
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 Ferrotychite
Other Language Names for Ferrotychite
Relationship of Ferrotychite to other Species
Member of:
Other Members of Northupite Group:
| Manganotychite | Na6Mn2(CO3)4(SO4) | Iso. m3(2/m3) : Fd3 |
| Northupite | Na3Mg(CO3)2Cl | Iso. m3(2/m3) : Fd3 |
| Tychite | Na6Mg2(CO3)4(SO4) | Iso. m3(2/m3) : Fd3 |
Forms a series with:
Common Associates
Related Minerals - Strunz-mindat Grouping
| 5.BF.05 | Northupite | Na3Mg(CO3)2Cl |
| 5.BF.05 | Manganotychite | Na6Mn2(CO3)4(SO4) |
| 5.BF.05 | Tychite | Na6Mg2(CO3)4(SO4) |
| 5.BF.10 | Sidorenkite | Na3Mn2+(CO3)(PO4) |
| 5.BF.10 | Crawfordite | Na3Sr(CO3)(PO4) |
| 5.BF.10 | Bonshtedtite | Na3Fe2+(CO3)(PO4) |
| 5.BF.10 | Bradleyite | Na3Mg(CO3)(PO4) |
| 5.BF.15 | Daqingshanite-(Ce) | (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x |
| 5.BF.20 | Reederite-(Y) | (Na,Mn)15Y2(CO3)9(FSO3)Cl |
| 5.BF.25 | Mineevite-(Y) | Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2Cl |
| 5.BF.30 | Brianyoungite | Zn3(CO3,SO4)(OH)4 |
| 5.BF.35 | Philolithite | Pb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4 |
| 5.BF.40 | Leadhillite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.40 | Macphersonite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.40 | Susannite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.45 | Peatite-(Y) | Li4Na12Y12(PO4)12(CO3)4(F,OH)8 |
| 5.BF.50 | Ramikite-(Y) | Li4(Na,Ca)12Y6Zr6(PO4)12(CO3)4O4[(OH),F]4 |
Other Information
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 Ferrotychite
mindat.org URL:
https://www.mindat.org/min-1533.html
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References for Ferrotychite
Reference List:
Localities for Ferrotychite
Showing 2 localities.
Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Angola | |
| Castellano Calvo A et al. (2014) |
Russia (TL) | |
| ZVMO (1981) +1 other reference |
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The
Olenii Ruchei, Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia