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Chelyabinskite

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Formula:
(Ca,Mg)
 
3
(SO
 
4
,CO
 
3
)
 
2
[Si(OH)
 
6
] · 9H
 
2
O (?)
System:OrthorhombicColour:White
Lustre:Silky, DullHardness:3
Name:After the area of occurrence, the Chelyabinsk coal basin, Urals Region, Russia.


A substance of anthropogenic origin (burning coal mine dumps). Current IMA regulations do not allow such substances to be validated as mineral species.

A questionable mineral, possessing many properties and values of, and possibly identical to Thaumasite.

Originally reported from Chelyabinsk coal basin, Chelyabinsk Oblast', Urals Region, Russia.

Classification of Chelyabinskite

IMA status:Rejected 1986
Explanation of status:Anthropogenic origin.
Nickel-Strunz 10th (pending) edition ID:7.DG.45

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
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Physical Properties of Chelyabinskite

Lustre:Silky, Dull
Diaphaneity (Transparency):Opaque
Colour:White
Hardness (Mohs):3
Density (measured):1.908 - 1.912 g/cm3
Density (calculated):1.938 g/cm3

Crystallography of Chelyabinskite

Crystal System:Orthorhombic
Cell Parameters:a = 19.01Å, b = 20.93Å, c = 22.45Å
Ratio:a:b:c = 0.908 : 1 : 1.073
Unit Cell Volume:V 8,932.39 ų (Calculated from Unit Cell)
Z:18

Optical Data of Chelyabinskite

Type:Biaxial
RI values: nα = 1.475 nβ = 1.495 nγ = 1.508
2V:Measured: 77° , Calculated: 76°
Maximum Birefringence:δ = 0.033

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Chelyabinskite

Formula:
(Ca,Mg)
 
3
(SO
 
4
,CO
 
3
)
 
2
[Si(OH)
 
6
] · 9H
 
2
O (?)
Essential elements:Ca, H, O, S, Si
All elements listed in formula:C, Ca, H, Mg, O, S, Si

Relationship of Chelyabinskite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DG.05Darapskite
Na
 
3
(SO
 
4
)(NO
 
3
) · H
 
2
O
7.DG.10Clinoungemachite
(Na, K, Fe, SO
 
4
)
7.DG.10Humberstonite
Na
 
7
K
 
3
Mg
 
2
(SO
 
4
)
 
6
(NO
 
3
)
 
2
 · 6H
 
2
O
7.DG.10Ungemachite
K
 
3
Na
 
8
Fe(SO
 
4
)
 
6
(NO
 
3
)
 
2
 · 6H
 
2
O
7.DG.15Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
(SO
 
4
)
 
3
(OH)
 
12
 · 26H
 
2
O
7.DG.15Charlesite
Ca
 
6
(Al,Si)
 
2
(SO
 
4
)
 
2
[B(OH)
 
4
](OH,O)
 
12
 · 26H
 
2
O
7.DG.15Ettringite
Ca
 
6
Al
 
2
(SO
 
4
)
 
3
(OH)
 
12
 · 26H
 
2
O
7.DG.15Jouravskite
Ca
 
6
Mn
3+
2
(SO
 
4
,CO
 
3
)
 
3
(OH)
 
12
 · 26H
 
2
O
7.DG.15Sturmanite
Ca
 
6
(Fe
3+
 
,Al,Mn
3+
 
)
 
2
(SO
 
4
)
 
2
[B(OH)
 
4
](OH)
 
12
 · 25H
 
2
O
7.DG.15Thaumasite
Ca
 
3
(SO
 
4
)[Si(OH)
 
6
](CO
 
3
) · 12H
 
2
O
7.DG.15Carraraite
Ca
 
3
(SO
 
4
)[Ge(OH)
 
6
](CO
 
3
) · 12H
 
2
O
7.DG.15Buryatite
Ca
 
3
(Si,Fe,Al)(SO
 
4
)[B(OH)
 
4
]O(OH)
 
5
 · 12H
 
2
O
7.DG.20Rapidcreekite
Ca
 
2
(SO
 
4
)(CO
 
3
) · 4H
 
2
O
7.DG.20Korkinoite
Ca
 
4
(SO
 
4
)
 
2
(CO
 
3
)
 
2
 · 9(H
 
2
O)
7.DG.25Tatarskite
Ca
 
6
Mg
 
2
(SO
 
4
)
 
2
(CO
 
3
)
 
2
(OH)
 
4
Cl
 
4
 · 7H
 
2
O
7.DG.30Nakauriite
Cu
 
8
(SO
 
4
)
 
4
(CO
 
3
)(OH)
 
6
 · 48H
 
2
O
7.DG.35Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
(SO
 
4
)
 
10
(SiO
 
4
)
 
2
 · 40H
 
2
O
7.DG.40Carlosruizite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SeO
 
4
)
 
12
(IO
 
3
)
 
12
 · 12H
 
2
O
7.DG.40Fuenzalidaite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SO
 
4
)
 
12
(IO
 
3
)
 
12
 · 12H
 
2
O

Other Names for Chelyabinskite

Other Languages:
German:Chelyabinskit
Spanish:Chelyabinskita

Other Information

Fluorescence in UV light:Bluish white fluorescence (UV).
Other Information:Boils intensely in HCl, leaving a siliceous residue.
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 Chelyabinskite

Reference List:

- +
Chesnokov, B.V., L.F. Bazhenova, E.P. Shcherbakova, T.A. Michal, T.N. Deriabina (1988) New minerals from the burned dumps of the Chelyabinsk coal basin. In Mineralogy, technogenesis, and mineral-resource complexes of the urals, 5-31. Akad. Nauk SSSR-Uralskoe Otdel. (in Russian).

Jambor, John L. and Puziewicz, Jacek (1993) New Mineral Names. American Mineralogist: 78: 1108-1112.

Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).

Internet Links for Chelyabinskite

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    • Localities for Chelyabinskite

    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.
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
    Cesnokov, B., M. Kotrly, and T. Nisanbajev (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
    Igor Pekov (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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