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Srebrodolskite

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Ronneburg U deposit, Gera, Thuringia, Germany
© Thomas Witzke

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Formula:
Ca
 
2
Fe
 
2
O
 
5
System:OrthorhombicColour:Black
Hardness:5½
Name:Named after Boris Ivanovich Srebrodolsky (b. 1927), mineralogist, Institute of Geology and Geochemistry, Lvov (Ukraine).
This page provides mineralogical data about Srebrodolskite.

Classification of Srebrodolskite

IMA status:Approved 1984
Strunz 8th edition ID:4/A.07-20
Nickel-Strunz 10th (pending) edition ID:4.AC.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
C : M:O = 1:1 (and up to 1:1.25); with large cations (+- smaller ones)
Hey's CIM Ref.:7.20.13

7 : Oxides and Hydroxides
20 : Oxides of Fe
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Type Occurrence of Srebrodolskite

Type Locality:Kopeisk, Chelyabinsk coal basin, Chelyabinsk Oblast', Urals Region, Russia
Year of Discovery:1985

Physical Properties of Srebrodolskite

Lustre:Adamantine
Colour:Black
Streak:Grayish brown
Hardness (Mohs):5½

Crystallography of Srebrodolskite

Crystal System:Orthorhombic
Cell Parameters:a = 5.42Å, b = 14.75Å, c = 5.59Å
Ratio:a:b:c = 0.367 : 1 : 0.379
Unit Cell Volume:V 446.89 ų (Calculated from Unit Cell)

Optical Data of Srebrodolskite

Type:Biaxial (-)
RI values: nα = 2.240 nβ = 2.250 nγ = 2.270
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:relatively strong

Chemical Properties of Srebrodolskite

Formula:
Ca
 
2
Fe
 
2
O
 
5
Essential elements:Ca, Fe, O
All elements listed in formula:Ca, Fe, O

Relationship of Srebrodolskite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.AC.05Swedenborgite
NaBe
 
4
SbO
 
7
4.AC.10Brownmillerite
Ca
 
2
(Al,Fe
3+
 
)
 
2
O
 
5
4.AC.15Montroydite
HgO
4.AC.20Litharge
PbO
4.AC.20Romarchite
SnO
4.AC.25Massicot
PbO
Related Minerals - Hey's Index Grouping:
7.20.1Wüstite
FeO
7.20.2Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
7.20.3Maghemite
Fe
 
2
O
 
3
7.20.4Hematite
Fe
 
2
O
 
3
7.20.5Goethite
α-Fe
3+
 
O(OH)
7.20.6Akaganeite
β-Fe
3+
 
O(OH,Cl)
7.20.7Feroxyhyte
Fe
3+
 
O(OH)
7.20.8Lepidocrocite
γ-Fe
3+
 
O(OH)
7.20.9Ferrihydrite
Fe
 
5
O
 
3
(OH)
 
9
7.20.10Amakinite
(Fe
2+
 
,Mg)(OH)
 
2
7.20.11Magnesioferrite
MgFe
3+
2
O
 
4
7.20.12Muskoxite
Mg
 
7
Fe
 
4
O
 
13
·10H
 
2
O
7.20.14Hercynite
FeAl
 
2
O
 
4
7.20.15Brownmillerite
Ca
 
2
(Al,Fe
3+
 
)
 
2
O
 
5

Other Names for Srebrodolskite

Synonyms:
IMA1984-050
German names:
Srebrodolskit
Russian names:
Сребродольскит
Spanish names:
Srebrodolskita

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 Srebrodolskite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1985): 114(2): 195-199.

American Mineralogist (1986): 71: 1279-1280.

Acta Chemica Scandinavica: 25: 3616-3624.

Internet Links for Srebrodolskite

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    Localities for Srebrodolskite

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    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.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Ústí Region
        • Duchcov (Dux)
    		Žáček V., Skála R., Chlupáčová M., Dvořák Z. 2005: Ca-Fe3+-rich, Si-undersaturated buchite from Želénky, North-Bohemian Brown Coal Basin, Czech Republic. Eur. J. Mineral., 17, 623-633
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
    		Lapis, 15 (5), 9-36.
    • Thuringia
      • Gera
        • Ronneburg U deposit
    		XRD and SEM-EDX analysis (T. Witzke)
    Russia
     
    • Urals Region
      • Chelyabinsk Oblast'
        • Chelyabinsk coal basin
    Mineral and/or Locality
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