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Chekhovichite

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About ChekhovichiteHide

Formula:
Bi2Te4+4O11
Colour:
Grayish yellow, pale gray, or grayish green.
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
6.88
Crystal System:
Monoclinic
Name:
Name in honor of Sergei Konstantinovich Chekhovich (Сергея Константинович Чехович) (1917-1997), mineralogist and professor at the Polytechnic Institute, Alma Ata, Kazakhstan.
This page provides mineralogical data about Chekhovichite.


Classification of ChekhovichiteHide

Approved
First Published:
1987
4.JK.35

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
34.6.4.1

34 : SELENITES, TELLURITES AND SULFITES
6 : Anhydrous Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
28.3.17

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

Physical Properties of ChekhovichiteHide

Adamantine
Transparency:
Translucent
Colour:
Grayish yellow, pale gray, or grayish green.
Streak:
White
Hardness:
Hardness:
VHN100=205 - 325 kg/mm2 - Vickers
Cleavage:
Perfect
One perfect parallel to elongation
Less perfect 87 degrees from first cleavage
Density:
6.88(1) g/cm3 (Measured)    7 g/cm3 (Calculated)

Optical Data of ChekhovichiteHide

Type:
Biaxial (-)
RI values:
nα = 2.450(2) nβ = 2.500(2) nγ = 2.650(2)
2V:
Measured: 65° , Calculated: 64°
Max Birefringence:
δ = 0.200
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Type:
Anisotropic
Anisotropism:
Marked
Bireflectance:
Observable
Dispersion:
r < v strong
Colour in reflected light:
Pale gray to gray
Internal Reflections:
White

Chemical Properties of ChekhovichiteHide

Formula:
Bi2Te4+4O11
IMA Formula:
Bi3+2Te4+4O11

Crystallography of ChekhovichiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 18.8963(8) Å, b = 7.9563(8) Å, c = 6.9909(3) Å
β = 95.176(3)°
Ratio:
a:b:c = 2.375 : 1 : 0.879
Unit Cell V:
1,046.76 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Subhedral platy grains
Twinning:
Polysynthetic, parallel elongation.
Comment:
On synthetic material

Type Occurrence of ChekhovichiteHide

Place of Conservation of Type Material:
A E Fernsman Museum, Moscow 88052
Reference:
Spiridonov, E.M., Petrova, I.V., Demina, L.A., Dolgikh, V.I., Antonyan, G.M. (1987) The new mineral chekhovichite (Bi2Te4O11). Vestnik Moskovskogo Universiteta, Geologiya (Moscow University Geology Bulletin): 42(6): 71-75.

Synonyms of ChekhovichiteHide

Other Language Names for ChekhovichiteHide

Related Minerals - Nickel-Strunz GroupingHide

4.JK.05WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.05Walfordite(Fe3+,Te6+)Te4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.10SpiroffiteMn2+2Te4+3O8Mon. 2/m : B2/b
4.JK.10ZincospiroffiteZn2Te4+3O8Mon. 2/m
4.JK.15BalyakiniteCu(TeO3)Orth.
4.JK.20RajiteCu(Te4+2O5)Mon. 2/m : P21/b
4.JK.25CarlfriesiteCaTe4+2Te6+O8Mon. 2/m : B2/b
4.JK.30Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
4.JK.40SmirniteBi2Te4+O5Orth. mm2
4.JK.45Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6ClIso. 4 3 2 : P41 3 2
4.JK.50FairbankitePb(TeO3)Tric.
4.JK.55PlumbotelluritePb(TeO3)Orth.
4.JK.60Magnolite(Hg+2)(Te4+O3)Orth. mm2
4.JK.65MoctezumitePb(UO2)(TeO3)2Mon.
4.JK.70Schmitterite(UO2)(TeO3)Orth.
4.JK.75Cliffordite(UO2)Te4+3O7Iso. m3 (2/m 3) : Pa3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

28.3.1BalyakiniteCu(TeO3)Orth.
28.3.2RajiteCu(Te4+2O5)Mon. 2/m : P21/b
28.3.3GraemiteCu[TeO3] · H2OOrth. mmm (2/m 2/m 2/m) : Pmma
28.3.4TeineiteCu2+(Te4+O3) · 2H2OOrth. mmm (2/m 2/m 2/m)
28.3.5CesbroniteCu2+3Te6+O4(OH)4Orth. mmm (2/m 2/m 2/m) : Cmcm
28.3.6MroseiteCaTe4+(CO3)O2Orth. mmm (2/m 2/m 2/m) : Pbca
28.3.7QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2yTrig. 3m (3 2/m) : P3m1
28.3.8ZemanniteMg0.5ZnFe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.9KinichiliteMg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.10Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
28.3.11SpiroffiteMn2+2Te4+3O8Mon. 2/m : B2/b
28.3.12WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
28.3.13FairbankitePb(TeO3)Tric.
28.3.14PlumbotelluritePb(TeO3)Orth.
28.3.15Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6ClIso. 4 3 2 : P41 3 2
28.3.16SmirniteBi2Te4+O5Orth. mm2
28.3.18Cliffordite(UO2)Te4+3O7Iso. m3 (2/m 3) : Pa3
28.3.19Schmitterite(UO2)(TeO3)Orth.
28.3.20MoctezumitePb(UO2)(TeO3)2Mon.
28.3.21EmmonsiteFe3+2(TeO3)3 · 2H2OTric. 1 : P1
28.3.22BlakeiteFe3+2[TeO3]3 (?)
28.3.23MackayiteFe3+(Te4+2O5)(OH)Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
28.3.24PoughiteFe3+2(TeO3)2(SO4)(H2O)2 · H2OOrth.
28.3.25SonoraiteFe3+(TeO3)(OH) · H2OMon.
28.3.26RodalquilariteFe2(TeO2OH)3(TeO3)ClTric. 1 : P1
28.3.27EztlitePb2+2Fe3+3(Te4+ O3)3(SO4)O2ClMon. m : Bm
28.3.28KeystoneiteMg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2OHex.

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 ChekhovichiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Frit, Bernard; Jaymes, Michel (1972) Le système Bi2O3-TeO2 à 450°C. Revue de Chimie Minerale: 9: 837-844.
Spiridonov, E.M., Petrova, I.V., Demina, L.A., Dolgikh, V.I., Antonyan, G.M. (1987) The new mineral chekhovichite (Bi2Te4O11). Vestnik Moskovskogo Universiteta, Geologiya (Moscow University Geology Bulletin): 42(6): 71-75.
Jambor, J.L., Burke, E.A.J. (1989) New mineral names. American Mineralogist: 74: 1399-1404.
Rossell, H.J., Leblanc, M., Férey, G., Bevan, D.J.M., Simpson, D.J., Taylor, M.R. (1992) On the crystal structure of Bi2Te4O11. Australian Journal of Chemistry: 45: 1415-1425.
Szaller, Zs., Pöppl, L., Lovas, Gy., Dódonyc, I. (1996) Study of the Formation of Bi2Te4O11. Journal of Solid State Chemistry: 121(2): 251-261.

Internet Links for ChekhovichiteHide

Localities for ChekhovichiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Armenia (TL)
 
  • Gegharkunik Province
    • Vardenis
AM 74 (1989), 1400; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Canada
 
  • Ontario
    • Thunder Bay District
Liferovich & Mitchell pers. comm. L. Horváth 2005: L. Horváth 2009
Kazakhstan (TL)
 
  • Akmola Region
    • Stepnogorsk
      • Aksu (Aqsu)
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • Utah
    • Utah Co.
SEM-EDS analyzed by Dr. Rob Bowell.
 
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