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Tochilinite

A valid IMA mineral species
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Photos of Tochilinite (79)
Tochilinite GallerySearch Photos of Tochilinite
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Fe2+5-6(Mg,Fe2+)5S6(OH)10
Colour:
Bronze-black
Lustre:
Metallic
Hardness:
1 - 1½
Specific Gravity:
2.96 - 2.99
Crystal System:
Monoclinic
Member of:
Valleriite Group
Name:
Named in honor of Mitrofan Stepanovich Tochilin (Митрофан Степанович Точилин) (15 December 1910, Bolshaya Podosinki, now Bryansk region, Russian Empire - 11 January 1968, Voronezh, USSR), Professor of Mineralogy, Voronezh University, Russia. He was a specialist on the Kola Penninsula.
Type Locality:
ⓘNizhnii Mamon Cu-Ni Deposit, Nizhnii Mamon Village, Upper Don River, Voronezh Oblast, Russia
Valleriite Group.

The Mg analogue offerrotochilinite.


Unique Identifiers
IMA Formula:
6(Fe0.9S) · 5[(Mg,Fe)(OH)2]
Approval year:
1971
First published:
1971
Type description reference:
Organova, N.I., Genkin, A.D., Drits, V.A., Molotkov, S.P., Kuz'mina, O.V., Dmitrik, A.L. (1971) Tochilinite, a new sulfide-hydroxide of iron and magnesium. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 100(4): 477-487.

Classification of Tochilinite
Dana 8th ed.:
2.14.2.1

2 : SULFIDES
14 : Hydroxysulfides and Hydrated Sulfides
Hey's CIM Ref.:
4.8

4 : Oxysulphides

Mineral Symbols
Transparency:
Opaque
Colour:
Bronze-black
Hardness:
1 - 1½ onMohs scale
Hardness:
VHN5=15 - 19 kg/mm2 - Vickers
Cleavage:
Distinct/Good
On {001}
Density:
2.96 - 2.99 g/cm3 (Measured)    3.03 g/cm3 (Calculated)

Optical Data of Tochilinite
Colour in reflected light:
Yellowish brown.
Pleochroism:
Strong
Comments:
Yellowish brown to yellowish gray.

Chemistry of Tochilinite

Crystallography of Tochilinite
General Appearance of Type Material:
As radiating aggregates of cylindrical acicular crystals, which may be hollow, to 1 cm; as paper-thin coatings, felted masses, and as clots.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
In serpentinite (lizardite), in a Cu-Ni bearing intrusive complex and in basic intrusive rocks.
Associated Minerals at Type Locality:
Lizardite
Reference:
Organova, N.I., Genkin, A.D., Drits, V.A., Molotkov, S.P., Kuz'mina, O.V., Dmitrik, A.L. (1971) Tochilinite, a new sulfide-hydroxide of iron and magnesium. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 100(4): 477-487.

Synonyms of Tochilinite

Other Language Names for Tochilinite

Relationship of Tochilinite to other Species
Other Members of Valleriite Group:
Ekplexite(Nb,Mo,W)S2 · (Mg1-xAlx)(OH)2+xTrig.
FerrotochiliniteFe2+6(Fe2+,Mg)5S6(OH)10Mon.
Ferrovalleriite2(Fe,Cu)S · 1.5Fe(OH)2Trig.
Haapalaite(Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22Hex.
Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Trig.
Yushkinite(Mg,Al)V4+S2(OH)2Trig.3m(32/m) :P3m1

Common AssociatesTrig.2.FD.05KermesiteSb2S2OTric.1 :P12.FD.10Viaeneite(Fe,Pb)4S8OMon.2.FD.20ErditeNaFeS2 · 2H2OMon. 2/m :B2/b2.FD.25CoyoteiteNaFe3S5 · 2H2OTric.2.FD.30Yushkinite(Mg,Al)V4+S2(OH)2Trig.3m(32/m) :P3m12.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.35FerrotochiliniteFe2+6(Fe2+,Mg)5S6(OH)10Mon.2.FD.40WilhelmramsayiteCu3FeS3 · 2H2OOrth.mmm(2/m2/m2/m) :Pmmm2.FD.45VyalsoviteFeCaAlS(OH)5Orth.2.FD.50BazhenoviteCa8S2(S3)(S2O3)(OH)12 · 20H2OMon. 2/m :P21/b2.FD.55UM2004-56-OS:BiCuPbPbCu4Bi4S2(O,OH,H2O)16 (?)Tet.

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    • References for TochiliniteⓘGrove Mountains 020005 meteoriteShen et al. (2022)Shen et al. (2022)Shen et al. (2022)Lee et al. (2019)
    Argentina
     
    Palmer et al. (Oct 2011)+1 other reference
    Armenia
     
    Nazarov et al. ( 1994)+1 other reference
    Australia
     
    Ralph Bottrill+1 other referenceTested by XRD and SEM-EDS by R BottrillBottrill et al. (2008)Palmer et al. (Oct 2011)+1 other referenceGrguric et al. (2013)[AmMin 87:182]
    Austria
     
    Niedermayr et al. (2005)Löffler et al. (2011)Löffler et al. (2011)Kolitsch et al. (2009)
    Brazil
     
    Oliveira et al. (2020)American Mineralogist+1 other reference
    Canada
     
    Franchuk et al. (2016)Anthony et al. (1990)162-165.+1 other referenceSabina (1986)Anthony et al. (1990)Sabina (1986)MSC Report 39+1 other referenceSabina+1 other referenceAnthony et al. (1990)179-181.+2 other referencesAnthony et al. (1990)Hull-Maniwaki+2 other references
    Costa Rica
     
    www.lpi.usra.edu (2020)
    Denmark
     
    Michael K. Weisberg et al. (2009)+1 other reference
    Finland
     
    Sandström (2012)
    France
     
    Weisberg et al. (2007)+5 other references
    India
     
    Metzler et al. (1992)
    Italy
     
    Schrader et al. (2008)+1 other referenceFerraris (1973)Boscardin M. et al. (2011)Boscardin M. et al. (Vicenza)Zordan A. (2014)Zordan et al. (2006)+2 other references
    Japan
     
    Matsubara et al. (1992)Anthony et al. (1990)
    Lithuania
     
    Zolensky et al. (1996)+1 other reference
    Netherlands
     
    www.lpi.usra.edu (2016)
    Northwest Africa Meteorites
     
    Jacquet et al. (2016)
    Oman
     
    Ivanova et al. (2002)+1 other reference
    Poland
     
    Nowinska (2020)
    Russia
     
    Gritsenko et al. (2008)+1 other referenceAnthony et al. (1990)+1 other referenceAnthony et al. (1990)Anthony et al. (1990)Antonov A.A. [Антонов А.А.] (2003)Sharygin et al. (2014)Pekov (1998)
    South Africa
     
    Zega et al. (2000)+1 other reference
    South Sudan
     
    Zolensky et al. (1996)
    Switzerland
     
    Cannon (2005)+1 other reference
    UK
     
    Anthony et al. (1990)
    Ukraine
     
    T.V. Shingareva et al. (2004)
    USA
     
    Dunning et al. (2002)California Geology: 48 (5)+1 other referenceCalifornia Geology: 48 (5)Zolensky (2014)Palmer et al. (Oct 2011)+1 other referenceParker (2005)Rubin et al. (2007)Anthony+1 other referenceAnthony et al. (1990)
    162173 Ryugu
     
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