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Ekmanite

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About EkmaniteHide

Formula:
(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Crystal System:
Orthorhombic
Name:
Named and first decribed by Igelström 1865 from the Brunsjö Mine (Brunnsjö Mine), Grythyttan, Hällefors, Västmanland, Sweden.
A variety of Stilpnomelane

Obsolete name for a Mn-rich stilpnomelane; the name was discredited in 1954.

The Mica Subcommittee (1998) regarded this as possibly Smectite.




Classification of EkmaniteHide

Discredited

Chemical Properties of EkmaniteHide

Formula:
(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O

Crystallography of EkmaniteHide

Crystal System:
Orthorhombic

Synonyms of EkmaniteHide

Other Language Names for EkmaniteHide

German:Ekmanit
Spanish:Ekmanita

Other InformationHide

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

References for EkmaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hamberg, A. (1889): Mineralogische Śtudien. Geologiska Föreningen i Stockholm Förhandlingar: 11:25-32
Nagy, B.(1954): Multiplicity and disorder in the lattice of ekmanite. American Mineralogist : 39: 946-956
Canadian Mineralogist (1998): 36: 905.
European Journal of Mineralogy (1999) 11: 299.

Internet Links for EkmaniteHide

Localities for EkmaniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan
 
  • Kochi
    • Kami City
M. Nakagawa, M. Santosh, S. Maruyama (2009) Distribution and mineral assemblages of bedded manganese deposits in Shikoku, Southwest Japan: Implications for accretion tectonics. Gondwana Research 16, 609–621.
    • Nankoku city
      • Ananai mine
M. Nakagawa, M. Santosh, S. Maruyama (2009) Distribution and mineral assemblages of bedded manganese deposits in Shikoku, Southwest Japan: Implications for accretion tectonics. Gondwana Research 16, 609–621.
M. Nakagawa, M. Santosh, S. Maruyama (2009) Distribution and mineral assemblages of bedded manganese deposits in Shikoku, Southwest Japan: Implications for accretion tectonics. Gondwana Research 16, 609–621.
Sweden
 
  • Örebro County
    • Hällefors
      • Grythyttan
Hamberg, A. (1889): Mineralogische Śtudien. Geologiska Föreningen i Stockholm Förhandlingar: 11:25-32; Am Min (1954) 39:946-956
  • Värmland County
    • Filipstad
No reference listed
USA
 
  • California
    • Mendocino Co.
      • Coastal Range
        • Laytonville
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
 
Mineral and/or Locality  
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