Spiridonov, E.M., Ershova, N.A., Tananaeva, O.I. (1989) Kochkarite PbBi4Te7 - A new mineral from contact metamorphosed ores. Geologiya Rudnykh Mestorozhdenii: 31: 98-102.

Classification of KochkariteHide

Strunz-mindat (2026):

2.GC.40b

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites

Dana 8th ed.:

2.6.3.1

2 : SULFIDES
6 : A_mB_nX_p, with (m+n):p = 4:3

Hey's CIM Ref.:

3.7.37

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi

Mineral SymbolsHide

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
Koc	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 KochkariteHide

Lustre:

Metallic

Colour:

Silver-gray

Streak:

Lead-gray

Hardness:

2 - 2½ on Mohs scale

Tenacity:

Flexible

Cleavage:

Perfect
Basal

Density:

7.94(3) g/cm³ (Measured) 7.89 g/cm³ (Calculated)

Optical Data of KochkariteHide

Anisotropism:

Strong

Bireflectance:

Clearly visible

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)
400nm	61.3%	58.2%
440nm	61.6%	58.6%
480nm	61.9%	58.7%
520nm	62.9%	58.8%
560nm	63.6%	59.2%
600nm	64.4%	59.8%
640nm	65.1%	60.6%
680nm	66.0%	61.7%
700nm	66.3%	62.1%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 66.3%.
R₁ shown in black, R₂ shown in red

Colour in reflected light:

White with pink tones

Chemistry of KochkariteHide

Mindat Formula:

PbBi₄Te₇

Element Weights:

Element	% weight
Te	46.129 %
Bi	43.171 %
Pb	10.701 %

Calculated from ideal end-member formula.

Elements listed:

Bi, Pb, Te - search for minerals with similar chemistry

Crystallography of KochkariteHide

Crystal System:

Trigonal

Cell Parameters:

a = 4.416(8) Å, c = 72.09(10) Å

Ratio:

a:c = 1 : 16.325

Unit Cell V:

1,217.49 Å³ (Calculated from Unit Cell)

Comment:

Point Group: 4/m 3 2/m, 43m, or 432. Space Group: Im3m, I432, or I43m.

Crystal StructureHide

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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)
0015545	Kochkarite	Talybov A G, Vainshtein B K (1962) An electron diffraction study of the second superlattice in PbBi4Te7 Soviet Physics Crystallography 7 32-37		1962	synthetic	0	293
0015543	Kochkarite	Talybov A G, Vainshtein B K (1962) An electron diffraction study of the structure of PbBi4Te7 Loality: synthetic Soviet Physics Crystallography 6 432-438		1962		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Kochkarite'
loop_
_publ_author_name
'Talybov A G'
'Vainshtein B K'
_journal_name_full 'Soviet Physics Crystallography'
_journal_volume 7 
_journal_year 1962
_journal_page_first 32
_journal_page_last 37
_publ_section_title
;
 An electron diffraction study of the second superlattice in PbBi4Te7
;
_database_code_amcsd 0015545
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Te5.25 Pb.75 Bi3'
_cell_length_a 4.44
_cell_length_b 4.44
_cell_length_c 71.7
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1224.097
_exptl_crystal_density_diffrn      7.880
_symmetry_space_group_name_H-M 'P -3 m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-y,-x,z'
  'y,-x+y,-z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  '-x+y,y,z'
  '-x,-y,-z'
  'y,x,-z'
  '-y,x-y,z'
  'x,x-y,z'
  'x-y,x,-z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Te1   0.66667   0.33333   0.01389   1.00000
Te2   0.00000   0.00000   0.04167   0.50000
Pb2   0.00000   0.00000   0.04167   0.50000
Bi3   0.33333   0.66667   0.06944   1.00000
Te4   0.66667   0.33333   0.09722   1.00000
Bi5   0.00000   0.00000   0.12500   1.00000
Te6   0.33333   0.66667   0.15278   1.00000
Bi7   0.66667   0.33333   0.18056   1.00000
Te8   0.00000   0.00000   0.20833   1.00000
Te9   0.33333   0.66667   0.23611   0.66667
Pb9   0.33333   0.66667   0.23611   0.33333
Te10   0.66667   0.33333   0.26389   0.83333
Pb10   0.66667   0.33333   0.26389   0.16667
Te11   0.00000   0.00000   0.29167   1.00000
Bi12   0.33333   0.66667   0.31944   1.00000
Te13   0.66667   0.33333   0.34722   1.00000
Bi14   0.00000   0.00000   0.37500   1.00000
Te15   0.33333   0.66667   0.40278   1.00000
Bi16   0.66667   0.33333   0.43056   1.00000
Te17   0.00000   0.00000   0.45833   0.50000
Pb17   0.00000   0.00000   0.45833   0.50000
Te18   0.33333   0.66667   0.48611   1.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.228 Å	(100)
2.364 Å	(58)
2.212 Å	(19)
2.005 Å	(33)
1.983 Å	(18)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of KochkariteHide

Type Locality:

ⓘ Kochkar' Au deposit, Plast, Plastovsky District, Chelyabinsk Oblast, Russia

General Appearance of Type Material:

Platy tabular crystals, often curved, measuring up to 10 x 10 x 3 mm.

Place of Conservation of Type Material:

A. E. Fersman Mineralogical Museum, Moscow, Russia.

Geological Setting of Type Material:

In a hornblende hornfels zone of a contact metamorphic aureole

Associated Minerals at Type Locality:

Aleksite	Galena	Native Gold	Pyrrhotite	Quartz
Rucklidgeite	Wittite

Reference:

Spiridonov, E.M., Ershova, N.A., Tananaeva, O.I. (1989) Kochkarite PbBi4Te7 - A new mineral from contact metamorphosed ores. Geologiya Rudnykh Mestorozhdenii: 31: 98-102.

Synonyms of KochkariteHide

IMA1988-030

Other Language Names for KochkariteHide

Dutch:Kochkariet

German:Kochkarit

Spanish:Kochkarita

Relationship of Kochkarite to other SpeciesHide

Member of:

Aleksite Group

Other Members of Aleksite Group:

Aleksite	PbBi₂Te₂S₂	Trig. 3m(32/m) : P31m
Babkinite	Pb₂Bi₂(S,Se)₃	Trig.
Clogauite	PbBi₄Te₄S₃	Trig. 3m(32/m) : P3m1
Hitachiite	Pb₅Bi₂Te₂S₆	Trig. 3m : P3m1
Poubaite	PbBi₂(Se,Te,S)₄	Trig. 3m(32/m) : R3m
Rucklidgeite	PbBi₂Te₄	Trig. 3m(32/m) : R3m
Saddlebackite	Pb₂Bi₂Te₂S₃	Hex.

Common AssociatesHide

Associations Based on Photo Data:

1 photo of Kochkarite associated with Chalcopyrite	CuFeS₂
1 photo of Kochkarite associated with Hematite	Fe₂O₃
1 photo of Kochkarite associated with Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
1 photo of Kochkarite associated with Chamosite	Fe²⁺₅Al(AlSi₃O₁₀)(OH)₈
1 photo of Kochkarite associated with Calcite	CaCO₃
1 photo of Kochkarite associated with Quartz	SiO₂
1 photo of Kochkarite associated with Monazite-(Ce)	Ce(PO₄)

Related Minerals - Strunz-mindat Grouping Hide

2.GC.05	Hatchite	AgTlPbAs₂S₅	Tric. 1 : P1
2.GC.05	Wallisite	(Cu,Ag)TlPbAs₂S₅	Tric. 1 : P1
2.GC.10	Sinnerite	Cu₆As₄S₉	Tric. 1 : P1
2.GC.15	Watanabeite	Cu₄(As,Sb)₂S₅	Orth.
2.GC.20	Simonite	TlHgAs₃S₆	Mon. 2/m
2.GC.25	Quadratite	Ag(Cd,Pb)AsS₃	Tet. 422 : P4₃22
2.GC.25	Manganoquadratite	AgMnAsS₃	Tet. 422 : P4₃22
2.GC.30	Smithite	AgAsS₂	Mon. 2/m
2.GC.35	Trechmannite	AgAsS₂	Trig. 3 : R3
2.GC.35	Debattistiite	Ag₉Hg_0.5As₆S₁₂Te₂	Tric. 1 : P1
2.GC.40a	Aleksite	PbBi₂Te₂S₂	Trig. 3m(32/m) : P31m
2.GC.40d	Saddlebackite	Pb₂Bi₂Te₂S₃	Hex.
2.GC.40c	Rucklidgeite	PbBi₂Te₄	Trig. 3m(32/m) : R3m
2.GC.40	Clogauite	PbBi₄Te₄S₃	Trig. 3m(32/m) : P3m1
2.GC.40e	Babkinite	Pb₂Bi₂(S,Se)₃	Trig.
2.GC.40c	Poubaite	PbBi₂(Se,Te,S)₄	Trig. 3m(32/m) : R3m
2.GC.45	Tvalchrelidzeite	Hg₃SbAsS₃	Mon. 2/m
2.GC.50	Mutnovskite	Pb₄As₂S₆ICl	Orth. mmm(2/m2/m2/m) : Pnma

Other InformationHide

Thermal Behaviour:

Melts at 580 C

Notes:

Tarnishes in air

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 KochkariteHide

mindat.org URL:

https://www.mindat.org/min-2234.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for KochkariteHide

Reference List:

Talybov, A.G., Vainshtein, B.K. (1962) An electron diffraction study of the structure of PbBi4Te7. Soviet Physics - Crystallography: 6: 432-438.

Talybov, A.G., Vainshtein, B.K. (1962) An electron diffraction study of the second superlattice in PbBi4Te7. Soviet Physics - Crystallography: 7: 32-37.

Spiridonov, E.M., Ershova, N.A., Tananaeva, O.I. (1989) Kochkarite PbBi4Te7 - A new mineral from contact metamorphosed ores. Geologiya Rudnykh Mestorozhdenii: 31: 98-102.

Jambor, John L., Vanko, David A. (1991) New Mineral Names. American Mineralogist, 76 (7-8) 1434-1440

(2005) Kochkarite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KochkariteHide

Showing 14 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.

Hide all sections | Show all sections

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.


Austria
Vorarlberg Bludenz District Lorüns ⓘ Limestone quarry	Kolitsch et al. (2020)

Canada
British Columbia Omineca Mining Division Lindquist Lake ⓘ Harrison Group (Deer Horn)	Roberts (2017)
Manitoba Snow Lake District ⓘ Stall Lake Mine	Alexandre (2025)
Québec Nord-du-Québec Jamésie Matagami ⓘ Perseverance mine	Kasprowicz (2023)

Cuba
Villa Clara Province ⓘ Antonio mine	Torró et al. (2016)

Peru
Arequipa Condesuyos Province Rio Grande district ⓘ San Luis Alta deposit	Alfonso et al. (2023)

Russia
Chelyabinsk Oblast Agapovsky District ⓘ Buranov Deposit	Kasatkin et al. (2022)
Plastovsky District Plast ⓘ Kochkar' Au deposit (TL)	Spiridonov et al. (1989) +1 other reference
Chukotka Autonomous Okrug Chaunskii District (Chaun) ⓘ Maiskoe Au deposit ?	Bortnikov et al. (2004)
Murmansk Oblast ⓘ Panarechka volcano	Chernyavsky et al. (2012) +1 other reference
Sakha Stanovoi Range Sutamskii Region ⓘ Alekseevskoye Au Mine ?	Pekov (1998)
Sverdlovsk Oblast Karpinsk Urban Okrug ⓘ Valentorskoye deposit	Maslennikov et al. (2013)

Sweden
Västerbotten County Skellefteå Boliden ⓘ Boliden Mine ?	Färber (n.d.)

USA
Michigan Marquette County Ishpeming Township Ishpeming Greenstone belt (Marquette Greenstone belt) ⓘ Gold Bluff prospect	Heinrich et al. (2004)

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Kochkarite

About KochkariteHide

Unique IdentifiersHide

IMA Classification of KochkariteHide

Classification of KochkariteHide

Mineral SymbolsHide

Physical Properties of KochkariteHide

Optical Data of KochkariteHide

Chemistry of KochkariteHide

Crystallography of KochkariteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of KochkariteHide

Synonyms of KochkariteHide

Other Language Names for KochkariteHide

Relationship of Kochkarite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for KochkariteHide

References for KochkariteHide

Localities for KochkariteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide