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Potassic-ferri-sadanagaite

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Formula:
{K}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2
The sadanagaite group minerals are defined as with 0,5 < A(Na+K+ 2Ca) where Na or K is dominant, and with 1,5 < C(Al+Fe3++2Ti), where Al or Fe3+ are dominant. The W position may contain (OH),F or Cl.

Potassic-ferri-sadanagaite is defined with
A position: K dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: (OH) dominant.
The referenced material was named potassic-ferrisadanagaite in the original description, but the analaysed material has Fe2+>>Mg, and after the redefinition of the sadanagaite group in the 2012 amphibole nomenclature, the correct name is potassic-ferro-ferri-sadanagaite.


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Classification of Potassic-ferri-sadanagaiteHide

Notes:
Unnamed (probably valid)
Approval History:
Unnamed, but probably valid.

Chemical Properties of Potassic-ferri-sadanagaiteHide

Formula:
{K}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2

The sadanagaite group minerals are defined as with 0,5 < A(Na+K+ 2Ca) where Na or K is dominant, and with 1,5 < C(Al+Fe3++2Ti), where Al or Fe3+ are dominant. The W position may contain (OH),F or Cl.

Potassic-ferri-sadanagaite is defined with
A position: K dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: (OH) dominant.

First Recorded Occurrence of Potassic-ferri-sadanagaiteHide

Relationship of Potassic-ferri-sadanagaite to other SpeciesHide

Other Members of this group:
Ferri-fluoro-sadanagaite{Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2
Ferri-sadanagaite{Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2
Ferro-ferri-fluoro-sadanagaite{Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2
Ferro-ferri-sadanagaite{Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
Ferro-fluoro-sadanagaite{Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2
Ferro-sadanagaite{Na}{Ca2}{Fe3Al2}(Al3Si5O22)(OH)2
Fluoro-sadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2
Potassic-chloro-sadanagaite{K}{Ca2}{Mg3Al2}(Al3Si5O22)Cl2
Potassic-ferro-chloro-sadanagaite{K}{Ca2}{Fe2+3Al2}(Al3Si5O22)Cl2
Potassic-ferro-ferri-sadanagaite{K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
Potassic-ferro-sadanagaite{K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2Mon.
Potassic-sadanagaite{K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon.
Sadanagaite{Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2Mon.

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 Potassic-ferri-sadanagaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hawthorne, F.C., Harlow, G.E. (2008) The crystal chemistry of Al-rich amphiboles: Sadanagaite and potassic-ferrisadanagaite. The Canadian Mineralogist: 46: 151-162.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for Potassic-ferri-sadanagaiteHide

Localities for Potassic-ferri-sadanagaiteHide

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 (FRL)
 
  • Ehime Prefecture
    • Inland Sea (Setonaikai)
Hidehiko Shamazaki, Michiaki Bunno, Tohru Ozawa: (1984): Sadanagaite and magnesio-sadanagaite, new silica-poor members of calcic amphibole from Japan, American Mineralogist, Volume 69, pages 465-471
Russia
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Ilmen Mts
Material from this locality has been renamed potassic-ferro-ferri-sadanagaite; Please do not reenter the old names here
Mineral and/or Locality  
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