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Bazhenovite

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Norfolk, England, UK
© C.Thomson 2003

Show Bazhenovite Photos (6)
Formula:
Ca
 
8
[(OH)
 
12
|S
 
2
O
 
3
|S
 
5
] · 20H
 
2
O
System:MonoclinicColour:Orange to yellow
Lustre:Vitreous, PearlyHardness:2
Name:For A. G. Bazhenov, geochemist and petrologist, and his wife, L. F. Bazhenova, analytical chemist, of the Il'menskii Preserve, Miass, Russia.


A mineral with polysulphide (Sx)2- and thiosulphate (S2O3)2- anions.

According to Bindi et al. (2005), the presence of (S2O3)2- anions in bazhenovite is doubtful.

Classification of Bazhenovite

IMA status:Approved 1986
Strunz 8th edition ID:2/F.12-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:29.9.3.1

29 : HYDRATED ACID AND NORMAL SULFATES
9 : Miscellaneous
Hey's CIM Ref.:4.1

4 : Oxysulphides
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Type Occurrence of Bazhenovite

Type Locality:Korkinskii coal quarry, Korkino, Chelyabinsk coal basin, Chelyabinsk Oblast', Urals Region, Russia
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:
TroiliteSulphurSideritePyrrhotitePyrite
PortlanditePericlaseOldhamiteIronFluorite

Physical Properties of Bazhenovite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Colour:Orange to yellow
Streak:Light yellow
Hardness (Mohs):2
Tenacity:Brittle
Cleavage:Very Good
on {010}
Fracture:Irregular/Uneven
Density (measured):1.83 g/cm3
Density (calculated):1.845 g/cm3

Crystallography of Bazhenovite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b (P1 1 21/b) [P21/c] {P1 21/c 1} {P21/a}
Cell Parameters:a = 8.45Å, b = 17.47Å, c = 8.24Å
β = 119.5°
Ratio:a:b:c = 0.484 : 1 : 0.472
Unit Cell Volume: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}
X-Ray Powder Diffraction:
d-spacingIntensity
8.76 (10)
4.39 (10)
1.996 (7)
2.91 (6)
2.81 (5)
2.62 (5)
Comments:Recorded on type material

Optical Data of Bazhenovite

Type:Biaxial (+)
RI values: nα = 1.595 nβ = 1.619 nγ = 1.697
2V:Measured: 60° , Calculated: 60°
Maximum Birefringence:δ = 0.102

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
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°

Chemical Properties of Bazhenovite

Formula:
Ca
 
8
[(OH)
 
12
|S
 
2
O
 
3
|S
 
5
] · 20H
 
2
O
Idealised Formula:
Ca(S
P
2.63
S
S
2.22
)
 
=4.85
 · Ca(S
T
2.25
O
 
3.00
) · Ca
 
6.00
(OH)
 
12.20
 · 20.14H
 
2
O
Essential elements:Ca, H, O, S
All elements listed in formula:Ca, H, O, S
Analyical Data:Chemical analysis of type material, water determined by thermogravimetry. The data in the second column were obtained by deducing iron as an impurity, portlandite (1 wt.-%) and water (1 wt.-%), and recasting the sulphur as sulphide (S), polysulphide (P) and thiosulphate (T).
Fe   (1.34)     -
Ca  (28.12)  (27.58)
O    (9.08)  (12.20)
S   (19.56)
S(S)          (6.11) - sulphide
S(P)          (7.25) - polysulphide
S(T)          (6.20) - thiosulphate
OH            (9.46)
H2O (41.9)   (31.20)

sum 100.00 wt.-%
Empirical Formula:
Ca
 
8
[(OH)
 
12
|S
 
2
O
 
3
|S
 
5
] · 20H
 
2
O

Relationship of Bazhenovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FD.05Kermesite
Sb
 
2
S
 
2
O
2.FD.10Viaeneite
(Fe,Pb)
 
4
S
 
8
O
2.FD.20Erdite
NaFeS
 
2
·2H
 
2
O
2.FD.25Coyoteite
NaFe
 
3
S
 
5
·2H
 
2
O
2.FD.30Haapalaite
(Fe
2+
 
,Ni)
 
2
(Mg,Fe
2+
 
)
 
1.61
[(OH)
 
3.22
|S
 
2
]
2.FD.30Valleriite
(Fe
2+
 
,Cu)
 
4
(Mg,Al)
 
3
[(OH,O)
 
6
|S
 
4
]
2.FD.30Yushkinite
V
 
<1
(Mg,Al)
 
n
[(OH,O)
 
2n
|S]
2.FD.35Tochilinite
Fe
2+
5-6
(Mg,Fe
2+
 
)
 
5
[(OH)
 
10
|S
 
6
]
2.FD.40Wilhelmramsayite
Cu
 
3
FeS
 
3
·2H
 
2
O
2.FD.45Vyalsovite
FeCaAl[(OH)
 
5
|S]
Related Minerals - Hey's Index Grouping:

- +
4.2Kermesite
Sb
 
2
S
 
2
O
4.3Sarabauite
CaSb
 
10
O
 
10
S
 
6
4.4Schöllhornite
Na
 
0.3
CrS
 
2
·H
 
2
O
4.5Yushkinite
V
 
<1
(Mg,Al)
 
n
[(OH,O)
 
2n
|S]
4.6Vyalsovite
FeCaAl[(OH)
 
5
|S]
4.7Valleriite
(Fe
2+
 
,Cu)
 
4
(Mg,Al)
 
3
[(OH,O)
 
6
|S
 
4
]
4.8Tochilinite
Fe
2+
5-6
(Mg,Fe
2+
 
)
 
5
[(OH)
 
10
|S
 
6
]
4.9Haapalaite
(Fe
2+
 
,Ni)
 
2
(Mg,Fe
2+
 
)
 
1.61
[(OH)
 
3.22
|S
 
2
]
4.10Apuanite
Fe
2+
 
Fe
3+
4
Sb
3+
4
O
 
12
S
4.11Versiliaite
Fe
 
2
Fe
 
4
Sb
 
6
O
 
16
S

Other Names for Bazhenovite

Synonyms:
IMA1986-053
Other Languages:
German:Bazhenovit
Russian:Баженовит
Spanish:Bazhenovita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bazhenovite

Reference List:Chesnokov, B. V., Polyakov, V. O. and Bushmakin, A. F. (1987): Bazhenovite CaS5.CaS2O3.6Ca(OH)2.20H2O - a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 116, 737-743 (in Russian). - American Mineralogist (1989), 74, 500 (abstract).

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 48.

Bindi, L., Bonazzi, P., Dei, L., Zoppi, A. (2005): Does bazhenovite structure really contain thiosulphate group? A structural and spectroscopic study of a sample from the type-locality. American Mineralogist 90, 1556-1562.

Articles/Blogs about Bazhenovite

Internet Links for Bazhenovite

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    Localities for Bazhenovite

    Hide Locality List
    The 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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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Belgium
     
    • Hainaut (Henegouwen; Hennegau) Province
      • Charleroi
    		Collection Elmar Lackner
    France
     
    • Midi-Pyrénées
      • Aveyron
    		Eytier J.R. & Ch., Favreau G., Devouard B., Vigier J. (2004), Minéraux de pyrométamorphisme de Lapanouse-de Sévérac (Aveyron), Cahier des Micromonteurs, n°85, pp: 3-58
    Germany
     
    • Thuringia
      • Gera
        • Ronneburg U deposit
    		T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
    Russia
     
    • Urals Region
      • Chelyabinsk Oblast'
        • Chelyabinsk coal basin
          • Korkino
    		ZVMO,(1987) 116, 737-743
    UK
     
    • England
    Mineral and/or Locality
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