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Ferrotochilinite

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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.


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Classification of FerrotochiliniteHide

Approved
Approval Year:
2011

Physical Properties of FerrotochiliniteHide

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:
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

Type:
Anisotropic
Anisotropism:
distinct gray bluish to yellowish beige rotation colors
Bireflectance:
distinct
Colour in reflected light:
gray, with the hue changing from pale beige to bluish
Internal Reflections:
none
Pleochroism:
Visible
Comments:
gray with a hue ranging from bluish (Rmin) to pale beige (Rmax)

Chemical Properties of FerrotochiliniteHide

Formula:
Fe2+6(Fe2+,Mg)5S6(OH)10
IMA Formula:
FeS · 0.85[Fe(OH)2]
Idealised Formula:
Fe2+6Fe2+5S6(OH)10

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

Powder Diffraction Data:
d-spacingIntensity
10.83 (13)
5.392 (100)
3.281 (7)
2.777 (7)
2.696 (12)
2.524 (12)
2.152 (8)
1.837 (11)

Type Occurrence of FerrotochiliniteHide

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:

Synonyms of FerrotochiliniteHide

Relationship of Ferrotochilinite to other SpeciesHide

Other Members of this 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)10
Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Hex.
Yushkinite(Mg,Al)V4+S2(OH)2Hex.

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.

References for FerrotochiliniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Sereda, E.V., Polekhovsky, Y.S., Britvin, S.N., Chukanov, N.V., Yapaskurt, V.O. and Bryzgalov, I.A. (2011) Ferrotochilinite, IMA 2010-080.CNMNC Newsletter No. 8, April 2011, page 294; Mineralogical Magazine, 75, 289-294.
Pekov, I. V., Sereda, E. V., Polekhovsky, Y. 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.

Internet Links for FerrotochiliniteHide

Localities for FerrotochiliniteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Krasnoyarsk Krai
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Putoran Plateau
          • Noril'sk
            • Talnakh Cu-Ni Deposit
Pekov, I.V., Sereda, E.V., Polekhovsky, Y.S., Britvin, S.N., Chukanov, N.V., Yapaskurt, V.O. and Bryzgalov, I.A. (2011) Ferrotochilinite, IMA 2010-080.CNMNC Newsletter No. 8, April 2011, page 294; Mineralogical Magazine, 75, 289-294. ; Pekov, I. V., Sereda, E. V., Yapaskurt, V. O., Polekhovsky, Y. S., Britvin, S. N., & Chukanov, N. V. (2013). Ferrovalleriite, 2 (Fe, Cu) S· 1.5 Fe (OH) 2: validation as a mineral species and new data. Geology of Ore Deposits, 55(8), 637-647.; Pekov, I. V., Sereda, E. V., Polekhovsky, Y. 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.
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