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Balyakinite

A valid IMA mineral species
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About BalyakiniteHide

Formula:
Cu(TeO3)
Colour:
Greyish-green, bluish-green
Hardness:
Specific Gravity:
5.6
Crystal System:
Orthorhombic
Name:
Named in honor of Tatyana Stepanovna Balyakina (Татьяна Степановна Балякина) (1906–1986), Geology Instructor, Moscow University, Moscow, Russia.
Alters to teineite.


Unique IdentifiersHide

Mindat ID:
501
Long-form identifier:
mindat:1:1:501:0

IMA Classification of BalyakiniteHide

Approved
IMA Formula:
Cu2+Te4+O3
Approval year:
1980
First published:
1980

Classification of BalyakiniteHide

4.JK.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
K : Tellurites without additional anions, without H2O
Dana 7th ed.:
34.1.3.1
34.1.3.1

34 : SELENITES, TELLURITES AND SULFITES
1 : A(XO3)
28.3.1

28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites

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

Physical Properties of BalyakiniteHide

Transparency:
Translucent
Colour:
Greyish-green, bluish-green
Streak:
Pale bluish-green
Hardness:
3½ on Mohs scale
Hardness:
VHN10=80 - 125 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
5.6 g/cm3 (Measured)    5.64 g/cm3 (Calculated)

Optical Data of BalyakiniteHide

Type:
Biaxial (-)
RI values:
nα = 2.11 nβ = 2.18 nγ = 2.22
2V:
Measured: 80° , Calculated: 72°
Max. Birefringence:
δ = 0.110
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Anisotropism:
slight
Dispersion:
strong
Colour in reflected light:
gray, bluish gray
Pleochroism:
Weak
Comments:
Shades of green

Chemistry of BalyakiniteHide

Mindat Formula:
Cu(TeO3)
Element Weights:
Element% weight
Te53.357 %
Cu26.572 %
O20.071 %

Calculated from ideal end-member formula.
Te
Cu
O

Crystallography of BalyakiniteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 7.6 Å, b = 12.7 Å, c = 5.83 Å
Ratio:
a:b:c = 0.598 : 1 : 0.459
Unit Cell V:
562.71 ų (Calculated from Unit Cell)
Z:
8
Comment:
Space Group: Pmcn.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011931BalyakiniteLindqvist O (1972) The crystal structure of CuTeO3 Acta Chemica Scandinavica 26 1423-14301972synthetic0293
0011928BalyakiniteLindqvist O (1971) On the crystal structures of CuTeO3 and CuTe2O5 Acta Chemica Scandinavica 25 740-7401971synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.85 Å(10)
2.84 Å(8)
3.09 Å(5)
1.711 Å(5)
4.34 Å(4)
3.18 Å(4)
2.28 Å(3.5)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47e : [Vanadates, chromates, manganates]
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of BalyakiniteHide

General Appearance of Type Material:
Integrowths up to 0.5mm and as very small short prismatic crystals.
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
In veinlets in aggregates of tetrahedrite, chalcopyrite, and tellurides.
Associated Minerals at Type Locality:

Synonyms of BalyakiniteHide

Other Language Names for BalyakiniteHide

Related Minerals - Strunz-mindat GroupingHide

4.JK.MatthiasweilitePbTe4+O3Tric. 1 : P1
4.JK.05Walfordite(Fe3+,Te6+)Te4+3O8Iso. m3(2/m3) : Ia3
4.JK.05WinstanleyiteTiTe4+3O8Iso. m3(2/m3) : Ia3
4.JK.10ZincospiroffiteZn2Te4+3O8Mon. 2/m : B2/b
4.JK.10SpiroffiteMn2+2Te4+3O8Mon. 2/m : B2/b
4.JK.20RajiteCu(Te4+2O5)Mon. 2/m : P21/b
4.JK.25CarlfriesiteCaTe4+2Te6+O8Mon. 2/m : B2/b
4.JK.30ChenzhangruiteMnFe2+Te4+4O10Tet. 4/mmm(4/m2/m2/m) : P42/nbc
4.JK.30StankeithiteMn2+Mn2+Te4+4 O10Tet. 4 : P42
4.JK.30PaulhlavaiteCaCuTe4+ 4O10Mon. 2/m : B2/b
4.JK.30DenningiteCaMn2+Te4+4O10Tet. 4/mmm(4/m2/m2/m) : P42/nbc
4.JK.35ChekhovichiteBi2Te4+4O11Mon. 2/m
4.JK.40SmirniteBi2Te4+O5Orth. mm2
4.JK.45Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6ClIso. 432 : P4132
4.JK.50FairbankitePb2+12(Te4+O3)11(SO4)Tric. 1 : P1
4.JK.55PlumbotelluritePb(TeO3)Mon. 2/m : B2/b
4.JK.60Magnolite[Hg2]2+[Te4+O3]Orth. mm2
4.JK.65MoctezumitePb(UO2)(TeO3)2Mon. 2/m : P21/b
4.JK.70Schmitterite(UO2)(TeO3)Orth. mmm(2/m2/m2/m)
4.JK.75Cliffordite(UO2)Te4+3O7Iso. m3(2/m3) : Pa3

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 BalyakiniteHide

References for BalyakiniteHide

Localities for BalyakiniteHide

Showing 5 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.
Belgium
 
  • Wallonia
    • Luxembourg
      • Vielsalm
Krygier (1982) +1 other reference
Krygier (1982) +2 other references
Russia (TL)
 
  • Buryatia
    • Muysky District
      • Muya
Spiridonov (1980) +1 other reference
  • Kamchatka Krai
    • Bystrinsky District
      • Central Kamchatka mining district
Spiridonov (1980) +1 other reference
    • Koryak Okrug
      • Karaginsky District
Spiridonov et al. (2009, April)
 
and/or  
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