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Grandiferrite

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Formula:
CaFe
 
4
O
 
7
System:TrigonalColour:Grey


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

Originates, along with hematite, during decomposition of superferrite.

Magnetic.

Classification of Grandiferrite

IMA status:Published without Approval
Explanation of status:Anthropogenic origin.
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Physical Properties of Grandiferrite

Lustre:Metallic
Colour:Grey
Streak:Dark cherry-red

Crystallography of Grandiferrite

Crystal System:Trigonal

Chemical Properties of Grandiferrite

Formula:
CaFe
 
4
O
 
7
Essential elements:Ca, Fe, O
All elements listed in formula:Ca, Fe, O

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 Grandiferrite

Reference List:

- +
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).

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  • Localities for Grandiferrite

    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.
    (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, northern Bohemian Brown Coal Basin, Czech Republic. European Journal of Mineralogy 17, 623-633.
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
    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).
    Igor Pekov (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Korkino
    Exotic Minerals of Russia.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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