Named in honor of Yuri Sergeevich Borodaev (Юрий Сергеевич Бородаев) (1923 - 2017), Russian mineralogist specializing in the mineralogy of ore deposits and professor at the Moscow State University. He discovered 7 new minerals.

Type Locality:

ⓘ Alyaskitovoye Sn-W deposit, Ust'-Nera, Indigirka River Basin, Sakha, Russia

Borodaevite is questionable as a pavonite homologue; it may correspond to a homeotypic derivative of treasurite (Ilinca & Makovicky, 1997; Moëlo et al., 2008).

Unique IdentifiersHide

Mindat ID:

728

Long-form identifier:

mindat:1:1:728:5

IMA Classification of BorodaeviteHide

IMA status:

Approved

IMA Formula:

Ag_4.83Fe_0.21Pb_0.45(Bi,Sb)_8.84S₁₆

Approval year:

1991

First published:

1992

Type description reference:

Nenasheva, S.N., Efimov, A.V., Sivtzov, A.V., Mozgova, N.N. (1992) Borodaevite [Ag5(Fe,Pb)1Bi7]13(Sb,Bi)2S17 — a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 121(4): 113-120.

Classification of BorodaeviteHide

Strunz-mindat (2026):

2.JA.05g

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb

Dana 8th ed.:

3.8.10.5

3 : SULFOSALTS
8 : 1 < ø < 2

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
Bdv	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 BorodaeviteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Black

Streak:

Black

Hardness:

3½ on Mohs scale

Hardness:

VHN₂₀=165 kg/mm² - Vickers

Density:

7.90 g/cm³ (Calculated)

Optical Data of BorodaeviteHide

Type:

Biaxial

Anisotropism:

Distinct, brown

Bireflectance:

Very weak, only on grain boundaries

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)
420nm	41.4%	39.9%
460nm	42.1%	39.8%
480nm	42.3%	39.7%
520nm	41.8%	39.1%
546nm	41.4%	38.8%
589nm	40.8%	37.9%
620nm	40.3%	37.7%
650nm	39.8%	36.9%
700nm	39.3%	36.1%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 42.3%.
R₁ shown in black, R₂ shown in red

Colour in reflected light:

White

Internal Reflections:

None

Pleochroism:

Non-pleochroic

Chemistry of BorodaeviteHide

Mindat Formula:

Ag₅(Bi,Pb,Fe)₈(Sb,Bi)₂S₁₇

Element Weights:

Element	% weight
Bi	55.732 %
S	18.171 %
Ag	17.979 %
Sb	8.118 %

Calculated from ideal end-member formula.

Elements listed:

Ag, Bi, Fe, Pb, S, Sb - search for minerals with similar chemistry

Crystallography of BorodaeviteHide

Crystal System:

Monoclinic

Cell Parameters:

a = 13.515(7) Å, b = 4.098(3) Å, c = 26.000(8) Å
β = 93.00(4)°

Ratio:

a:b:c = 3.298 : 1 : 6.345

Unit Cell V:

1,438.02 Å³ (Calculated from Unit Cell)

Comment:

Point Group: 2/m or m.; Space Group: C2/m or Cm.

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)
0018805	Borodaevite	Ilinca G, Makovicky E (1997) Note on the definition of borodayevite [Ag5(Fe,Pb)Bi7]13(Sb,Bi)2S17 and is probably not an good model for borodayevite Neues Jahrbuch fur Mineralogie, Monatshefte 1997 337-353		1997	Alyaskitovoye ore deposit, Yakutia	0	293
0018804	Borodaevite	Ilinca G, Makovicky E (1997) Note on the definition of borodayevite [Ag5(Fe,Pb)Bi7]13(Sb,Bi)2S17 Neues Jahrbuch fur Mineralogie, Monatshefte 1997 337-353		1997	Alyaskitovoye ore deposit, Yakutia	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Borodaevite'
loop_
_publ_author_name
'Ilinca G'
'Makovicky E'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 1997 
_journal_year 1997
_journal_page_first 337
_journal_page_last 353
_publ_section_title
;
 Note on the definition of borodayevite [Ag5(Fe,Pb)Bi7]13(Sb,Bi)2S17
 Note: This structure is based on a theoretical construct, (11P),
 and is probably not an good model for borodayevite
;
_database_code_amcsd 0018805
_chemical_compound_source 'Alyaskitovoye ore deposit, Yakutia'
_chemical_formula_sum 'Ag4.5 Bi7.4 Pb.6 Sb1.5 S16'
_cell_length_a 13.515
_cell_length_b 4.098
_cell_length_c 26.000
_cell_angle_alpha 90
_cell_angle_beta 93.00
_cell_angle_gamma 90
_cell_volume 1438.023
_exptl_crystal_density_diffrn      6.586
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
AgMl   0.00000   0.00000   0.50000   1.00000   0.02533
BiM2   0.25140   0.00000   0.42820   1.00000   0.02533
BiM3   0.07450   0.00000   0.13310   1.00000   0.02533
AgM4   0.36400   0.00000   0.20150   0.70000   0.02533
PbM4   0.36400   0.00000   0.20150   0.30000   0.02533
BiM5   0.16200   0.50000   0.26390   1.00000   0.02533
SbM6   0.45620   0.50000   0.32950   0.75000   0.02533
AgM6   0.45620   0.50000   0.32950   0.25000   0.02533
AgM7   0.28860   0.50000   0.06750   0.80000   0.02533
BiM7   0.28860   0.50000   0.06750   0.20000   0.02533
BiM8   0.00000   0.50000   0.00000   1.00000   0.02533
S1   0.16200   0.50000   0.47180   1.00000   0.02533
S2   0.40030   0.50000   0.41670   1.00000   0.02533
S3   0.22620   0.50000   0.16840   1.00000   0.02533
S4   0.01860   0.00000   0.23270   1.00000   0.02533
S5   0.30540   0.00000   0.29510   1.00000   0.02533
S6   0.10150   0.50000   0.36210   1.00000   0.02533
S7   0.43290   0.00000   0.10100   1.00000   0.02533
S8   0.13870   0.00000   0.03210   1.00000   0.02533

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.49 Å	(80 diffuse)
3.37 Å	(90 diffuse)
3.24 Å	(90)
2.82 Å	(100)
1.992 Å	(80)

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 BorodaeviteHide

Type Locality:

ⓘ Alyaskitovoye Sn-W deposit, Ust'-Nera, Indigirka River Basin, Sakha, Russia

General Appearance of Type Material:

Elongate, platy crystals, some with an angle of approx 94° between faces, or irregular grains up to 1.2 x 0.5 mm.

Place of Conservation of Type Material:

A. E. Fersman Mineralogical Museum, Moscow, Russia, 87992.

Associated Minerals at Type Locality:

Aramayoite	Benjaminite	Matildite	Molybdenite	Owyheeite
Pavonite	Quartz	Ramdohrite	Triplite

Reference:

Synonyms of BorodaeviteHide

Borodayevite

IMA1991-037

Other Language Names for BorodaeviteHide

Dutch:Borodaeviet

German:Borodaevit

Russian:Бородаевит

Spanish:Borodaevita

Related Minerals - Strunz-mindat Grouping Hide

2.JA.	Ferdowsiite	Ag₈(Sb₅As₃)S₁₆	Mon. 2/m : P2₁/b
2.JA.	Luboržákite	Mn₂AsSbS₅	Mon. 2/m : B2/m
2.JA.	Sangenaroite	Ag₈(Sb_8-xAs_x)S_Σ16	Mon. 2/m
2.JA.05a	Pavonite	AgBi₃S₅	Mon. 2/m : B2/m
2.JA.05b	Grumiplucite	HgBi₂S₄	Mon. 2/m : B2/m
2.JA.05c	Kudriavite	(Cd,Pb)Bi₂S₄	Mon. 2/m : B2/m
2.JA.05d	Cupromakovickyite	Cu₄AgPb₂Bi₉S₁₈	Mon. 2/m : B2/m
2.JA.05e	Benjaminite	Ag₃Bi₇S₁₂	Mon. 2/m : B2/m
2.JA.05i	Livingstonite	HgSb₄S₆(S₂)	Mon. 2/m : B2/b
2.JA.05h	Mozgovaite	PbBi₄S₇	Orth. mmm(2/m2/m2/m)
2.JA.05	Dantopaite	Ag₅Bi₁₃S₂₂	Mon. 2/m : B2/m
2.JA.05a	Cupropavonite	Cu_0.9Ag_0.5Pb_0.6Bi_2.5S₅	Mon. 2/m : B2/m
2.JA.05	Selenodantopaite	Ag₅Bi₁₃Se₂₂	Mon. 2/m : B2/m
2.JA.05a	Cupromakopavonite	Ag₃Cu₈Pb₄Bi₁₉S₃₈	Mon. 2/m : B2/m
2.JA.05d	Makovickyite	Cu_1.12Ag_0.81Pb_0.27Bi_5.35S₉	Mon. 2/m
2.JA.05f	Mummeite	Cu_0.58Ag_3.11Pb_1.10Bi_6.65S₁₃	Mon.
2.JA.10b	Kupčíkite	Cu_3.4Fe_0.6Bi₅S₁₀	Mon. 2/m : B2/m
2.JA.10d	Pizgrischite	(Cu,Fe)Cu₁₄PbBi₁₇S₃₅	Mon. 2/m : B2/m
2.JA.10c	Hodrušite	Cu₈Bi₁₂S₂₂	Mon. 2/m
2.JA.10a	Cuprobismutite	Cu₈AgBi₁₃S₂₄	Mon. 2/m : B2/m
2.JA.10e	Padĕraite	Cu₇[(Cu,Ag)_0.33Pb_1.33Bi_11.33]S₂₂	Mon. 2/m : P2₁/m
2.JA.15	Schapbachite	Ag_0.4Pb_0.2Bi_0.4S	Iso. m3m(4/m32/m) : Fm3m
2.JA.15	Cuboargyrite	AgSbS₂	Iso. m3m(4/m32/m)
2.JA.20	Matildite	AgBiS₂	Trig. 32 : P3₁21
2.JA.20	Volynskite	AgBiTe₂	Trig. 3m(32/m) : P3m1
2.JA.20	Bohdanowiczite	AgBiSe₂	Trig. 3m(32/m) : P3m1

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 BorodaeviteHide

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https://www.mindat.org/min-728.html
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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 BorodaeviteHide

Reference List:

Jambor, J.L.; Puziewicz, J.; Roberts, A.C. (1994) New mineral names. American Mineralogist, 79 (7-8). p.763-767.

Ilinca, G. and Makovicky, E. (1997) Note on the definition of borodayevite [Ag5(Fe,Pb)Bi7]13(Sb,Bi)2S17. Neues Jahrb. Mineral., Monatsh.: 337–353.

Mandarino, Joseph A. (1997) New Minerals 1990-1994. The Mineralogical Record Inc., Tuscon, Arizona. 220pp.

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

Moëlo, Yves, Makovicky, Emil, Mozgova, Nadejda N., Jambor, John L., Cook, Nigel, Pring, Allan, Paar, Werner, Nickel, Ernest H., Graeser, Stephan, Karup-Møller, Sven, Balic-unic, Tonči, Mumme, William G., Vurro, Filippo, Topa, Dan (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20 (1) 7-62 doi:10.1127/0935-1221/2008/0020-1778

Localities for BorodaeviteHide

Showing 2 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.


Russia (TL)
Sakha Indigirka River Basin Ust'-Nera ⓘ Alyaskitovoye Sn-W deposit (TL)	Nenasheva et al. (1992) +1 other reference

Slovakia
Žilina Region Liptovský Mikuláš District ⓘ ~~Vyšná Boca~~	Ozdín et al. (1999) +1 other reference

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Borodaevite

About BorodaeviteHide