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Bazhenovite
A valid IMA mineral species
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About Bazhenovite
Formula:
Ca8S2(S3)(S2O3)(OH)12 · 20H2O
Colour:
Orange to yellow
Lustre:
Vitreous, Pearly
Hardness:
2
Specific Gravity:
1.83
Crystal System:
Monoclinic
Name:
Named in honor of Alfred Georgievich Bazhenov (Альфред Георгиевич Баженов) (b. 1931), geochemist and petrologist, and his wife, Lyudmila Fedorovna Bazhenova (Людмилы Федоровны Баженовой) (b. 1938), analytical chemist, of the Ilmensky Preserve, Miass, Chelyabinsk Region, Russia.
A mineral with sulphide S2-, trisulphide (S3)2- and thiosulphate (S2O3)2- anions.
However, according to Bindi et al. (2005), the presence of (S2O3)2- anions in bazhenovite is doubtful.
Compare sulfhydrylbystrite.
However, according to Bindi et al. (2005), the presence of (S2O3)2- anions in bazhenovite is doubtful.
Compare sulfhydrylbystrite.
Unique Identifiers
Mindat ID:
584
Long-form identifier:
mindat:1:1:584:3
IMA Classification of Bazhenovite
Approved
IMA Formula:
Ca8(S5)2-(S6+O3S2-)(OH)12·20H2O
Approval year:
1986
First published:
1987
Classification of Bazhenovite
2.FD.50
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
29.9.3.1
29 : HYDRATED ACID AND NORMAL SULFATES
9 : Miscellaneous
29 : HYDRATED ACID AND NORMAL SULFATES
9 : Miscellaneous
4.1
4 : Oxysulphides
4 : Oxysulphides
Mineral Symbols
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 |
|---|---|---|
| Baz | 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 Bazhenovite
Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Orange to yellow
Streak:
Light yellow
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Very Good
on {010}
on {010}
Fracture:
Irregular/Uneven
Density:
1.83 g/cm3 (Measured) 1.845 g/cm3 (Calculated)
Optical Data of Bazhenovite
Type:
Biaxial (+)
RI values:
nα = 1.595 nβ = 1.619 nγ = 1.697
2V:
Measured: 60° , Calculated: 60°
Max. Birefringence:
δ = 0.102
Based on recorded range of RI values above.
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.
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:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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.
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.
Dispersion:
r > v or r < v
Pleochroism:
Strong
Comments:
X = deep yellow-green, Y = greenish yellow, Z = pale greenish yellow; Orientation: X = b, Y = a, Z vs. c = 30°
Chemistry of Bazhenovite
Mindat Formula:
Ca8S2(S3)(S2O3)(OH)12 · 20H2O
Element Weights:
Elements listed:
Crystallography of Bazhenovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Cell Parameters:
a = 8.45 Å, b = 17.47 Å, c = 8.24 Å
β = 119.5°
β = 119.5°
Ratio:
a:b:c = 0.484 : 1 : 0.472
Unit Cell V:
1,058.70 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Bladed or platy crystals, flattened on {010} and elongated along [001], showing {110}, {011}, {101} and {111}
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0003932 | Bazhenovite | Bindi L, Bonazzi P, Dei L, Zoppi A (2005) Does the bazhenovite structure really contain a thiosulfate group? A structural and spectroscopic study of a sample from the type locality American Mineralogist 90 1556-1562 |  | 2005 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.76 Å | (10) |
| 4.39 Å | (10) |
| 1.996 Å | (7) |
| 2.91 Å | (6) |
| 2.81 Å | (5) |
| 2.62 Å | (5) |
| 2.28 Å | (5) |
Comments:
Recorded on type material
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 54 : Coal and other mine fire minerals (see also #51 and #56) |
Type Occurrence of Bazhenovite
General Appearance of Type Material:
Bladed or platy, elongated crystals to 5 mm, in aggregates to 1 cm
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Among the melt products of an old, burning coal dump
Associated Minerals at Type Locality:
Synonyms of Bazhenovite
Other Language Names for Bazhenovite
Common Associates
Associations Based on Photo Data:
| 2 photos of Bazhenovite associated with Aragonite | CaCO3 |
| 2 photos of Bazhenovite associated with Portlandite | Ca(OH)2 |
| 2 photos of Bazhenovite associated with Oldhamite | CaS |
| 1 photo of Bazhenovite associated with Native Sulphur | S8 |
Related Minerals - Strunz-mindat Grouping
| 2.FD. | Ferrovalleriite | 2(Fe,Cu)S · 1.5Fe(OH)2 |
| 2.FD.05 | Kermesite | Sb2S2O |
| 2.FD.10 | Viaeneite | (Fe,Pb)4S8O |
| 2.FD.20 | Erdite | NaFeS2 · 2H2O |
| 2.FD.25 | Coyoteite | NaFe3S5 · 2H2O |
| 2.FD.30 | Yushkinite | (Mg,Al)V4+S2(OH)2 |
| 2.FD.30 | Valleriite | (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6 |
| 2.FD.30 | Ekplexite | (Nb,Mo,W)S2 · (Mg1-xAlx)(OH)2+x |
| 2.FD.30 | Haapalaite | (Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22 |
| 2.FD.35 | Kaskasite | (Mo,Nb)S2 · (Mg1-xAlx)(OH)2+x |
| 2.FD.35 | Manganokaskasite | (Mo,Nb)S2 · (Mn1-xAlx)(OH)2+x |
| 2.FD.35 | Tochilinite | Fe2+5-6(Mg,Fe2+)5S6(OH)10 |
| 2.FD.35 | Ferrotochilinite | Fe2+6(Fe2+,Mg)5S6(OH)10 |
| 2.FD.40 | Wilhelmramsayite | Cu3FeS3 · 2H2O |
| 2.FD.45 | Vyalsovite | FeCaAlS(OH)5 |
| 2.FD.55 | 'UM2004-56-OS:BiCuPb' | PbCu4Bi4S2(O,OH,H2O)16 (?) |
Other Information
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 Bazhenovite
mindat.org URL:
https://www.mindat.org/min-584.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Bazhenovite
Localities for Bazhenovite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Belgium | |
| Collection Elmar Lackner |
| www.mindat.org (2016) |
France | |
| Berbain et al. (1998) |
| Eytier J.R. & Ch. et al. (2004) |
Germany | |
| Bender et al. (1994) |
| Christophe Boutry collection |
| Witzke et al. (1998) |
Russia | |
| |
| ZVMO (1987) +1 other reference |
UK | |
| |
| Colleen Thomson Collection and photo |
Quick NavTopAbout BazhenoviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Lapanouse-de-Sévérac slag locality, Sévérac-d'Aveyron, Rodez, Aveyron, Occitanie, France