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Ferrotochilinite

A valid IMA mineral species
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01198720017491412492462.jpg
Ferrotochilinite

Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
01198720017491412492462.jpg
Ferrotochilinite

Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
01198720017491412492462.jpg
Ferrotochilinite

Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
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About FerrotochiliniteHide

Formula:
Fe2+6(Fe2+,Mg)5S6(OH)10
Colour:
dark bronze
Lustre:
Sub-Metallic
Hardness:
1
Specific Gravity:
3.467 (Calculated)
Crystal System:
Monoclinic
Name:
For the mineral tochilinite and its iron content.
The Fe analogue of tochilinite.


Unique IdentifiersHide

Mindat ID:
41905
Long-form identifier:
mindat:1:1:41905:5

IMA Classification of FerrotochiliniteHide

Classification of FerrotochiliniteHide

Strunz-mindat (2026):
2.FD.35

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O

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

Physical Properties of FerrotochiliniteHide

Lustre:
Sub-Metallic
Transparency:
Opaque
Colour:
Dark bronze
Comment:
With time, it becomes dull and darkens to almost black, with a blue violet or golden brown iridescence.
Streak:
Black
Hardness:
1 on Mohs scale
Hardness:
VHN100=13 - Vickers
Tenacity:
Flexible
Cleavage:
Perfect
{001}
Fracture:
Micaceous
Comment:
fracture is laminated
Density:
3.467 g/cm3 (Calculated)

Optical Data of FerrotochiliniteHide

Anisotropism:
Distinct, gray bluish to yellowish beige rotation colors.
Bireflectance:
Distinct.
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm12.6%10.8%
420nm12.3%10.9%
440nm12.0%11.0%
460nm11.7%11.1%
470nm11.6%11.4%
480nm11.5%11.3%
500nm11.4%11.5%
520nm11.3%11.8%
540nm11.2%12.2%
546nm11.2%12.4%
560nm11.2%12.7%
580nm11.1%13.3%
589nm11.1%13.6%
600nm11.1%14.0%
620nm11.0%14.6%
640nm11.0%15.2%
650nm11.0%15.5%
660nm10.9%15.8%
680nm10.8%16.3%
700nm10.8%16.9%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 16.9%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray.
Internal Reflections:
None.
Pleochroism:
Visible
Comments:
Gray with a hue ranging from bluish (Rmin) to pale beige (Rmax).

Chemistry of FerrotochiliniteHide

Mindat Formula:
Fe2+6(Fe2+,Mg)5S6(OH)10
Element Weights:
Element% weight
Fe62.891 %
S19.697 %
O16.380 %
H1.032 %

Calculated from ideal end-member formula.
Fe
S
O
H
Elements listed:
Fe, H, Mg, O, S - search for minerals with similar chemistry

Crystallography of FerrotochiliniteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 5.463(5) Å, b = 15.865(17) Å, c = 10.825(12) Å
β = 93.7(1)°
Ratio:
a:b:c = 0.344 : 1 : 0.682
Unit Cell V:
936.25 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space group C2/m, Cm or C2.

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]

Type Occurrence of FerrotochiliniteHide

Type Locality:
ⓘ Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
General Appearance of Type Material:
flattened parallel to [001] prismatic to elongated lamellar crystals. Aggregates (up to 6.5 mm in size) are fanlike, rosettelike, or chaotic.
Place of Conservation of Type Material:
Fersman Mineralogical Museum of Russian Academy of Sciences, Moscow, registration number 4058/1
Associated Minerals at Type Locality:
ChalcopyriteChlorite GroupCubaniteMagnetiteMooihoekite
Pentlandite
Reference:
Pekov, I. V., Sereda, E. V., Polekhovsky, Yu. S., Britvin, S. N., Chukanov, N. V., Yapaskurt, V. O., Bryzgalov, I. A. (2013) Ferrotochilinite, 6FeS · 5Fe(OH)2, a new mineral from the Oktyabr’sky deposit, Noril’sk district, Siberia, Russia. Geology of Ore Deposits, 55 (7) 567-574 doi:10.1134/s1075701513070106

Synonyms of FerrotochiliniteHide

Other Language Names for FerrotochiliniteHide

Relationship of Ferrotochilinite to other SpeciesHide

Member of:
Valleriite Group
Other Members of Valleriite Group:
Ekplexite(Nb,Mo,W)S2 · (Mg1-xAlx)(OH)2+xTrig.
Ferrovalleriite2(Fe,Cu)S · 1.5Fe(OH)2 Trig.
Haapalaite(Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22Hex.
TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10Mon.
Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Trig.
Yushkinite(Mg,Al)V4+S2(OH)2Trig. 3m(32/m) : P3m1

Related Minerals - Strunz-mindat GroupingHide

2.FD.Ferrovalleriite2(Fe,Cu)S · 1.5Fe(OH)2 Trig.
2.FD.05KermesiteSb2S2OTric. 1 : P1
2.FD.10Viaeneite(Fe,Pb)4S8OMon.
2.FD.20ErditeNaFeS2 · 2H2OMon. 2/m : B2/b
2.FD.25CoyoteiteNaFe3S5 · 2H2OTric.
2.FD.30Yushkinite(Mg,Al)V4+S2(OH)2Trig. 3m(32/m) : P3m1
2.FD.30Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Trig.
2.FD.30Ekplexite(Nb,Mo,W)S2 · (Mg1-xAlx)(OH)2+xTrig.
2.FD.30Haapalaite(Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22Hex.
2.FD.35Kaskasite(Mo,Nb)S2 · (Mg1-xAlx)(OH)2+xTrig.
2.FD.35Manganokaskasite(Mo,Nb)S2 · (Mn1-xAlx)(OH)2+xTrig.
2.FD.35TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10Mon.
2.FD.40WilhelmramsayiteCu3FeS3 · 2H2OOrth. mmm(2/m2/m2/m) : Pmmm
2.FD.45VyalsoviteFeCaAlS(OH)5Mon. m : Bm
2.FD.50BazhenoviteCa8S2(S3)(S2O3)(OH)12 · 20H2OMon. 2/m : P21/c
2.FD.55'UM2004-56-OS:BiCuPb'PbCu4Bi4S2(O,OH,H2O)16 (?)Tet.

Other InformationHide

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 FerrotochiliniteHide

References for FerrotochiliniteHide

Localities for FerrotochiliniteHide

Showing 4 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.
Australia
 
  • Tasmania
    • West Coast municipality
      • Zeehan mining district
R Bottrill unpub. Data
Costa Rica
 
  • Alajuela Province
    • San Carlos Canton
      • Aguas Zarcas District
Garvie (2021)
Czech Republic
 
  • Hradec Králové Region
    • Trutnov District
      • Pec pod Sněžkou
Veselovskỳ et al. (2018)
Russia (TL)
 
  • Krasnoyarsk Krai
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Norilsk-Talnakh Mining Region
          • Talnakh Cu-Ni Deposit
Williams et al. (2011) +2 other references
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