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Potassic-ferro-richterite

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Formula:
[K][CaNa][Fe
2+
5
]Si
 
8
O
 
22
(OH)
 
2
The richterite group minerals are defined as sodium-calcium amphiboles with 0,5 apfu < A(Na+K+ 2Ca) where Na or K is dominant, and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH),F or Cl.

Potassic-ferro-richterite is defined with
A position: K dominant
C position: Fe2+ dominant
W position: (OH) dominant.
Member of:Richterite group > Sodium-Calcium Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup
This page provides mineralogical data about Potassic-ferro-richterite.

Classification of Potassic-ferro-richterite

IMA status:Not Approved
mindat.org URL:http://www.mindat.org/min-39239.html
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Chemical Properties of Potassic-ferro-richterite

Formula:
[K][CaNa][Fe
2+
5
]Si
 
8
O
 
22
(OH)
 
2


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

Potassic-ferro-richterite is defined with
A position: K dominant
C position: Fe2+ dominant
W position: (OH) dominant.
Essential elements:Ca, Fe, H, K, Na, O, Si
All elements listed in formula:Ca, Fe, H, K, Na, O, Si

Relationship of Potassic-ferro-richterite to other Species

Member of:Richterite group > Sodium-Calcium Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup
Other Members of Group:

- +
Ferro-fluoro-richterite
{Na}{CaNa}{Fe
2+
5
}(Si
 
8
O
 
22
)F
 
2
Ferro-richterite
{Na}{CaNa}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
Fluoro-richterite
{Na}{CaNa}{Mg
 
5
}(Si
 
8
O
 
22
)(F,OH)
 
2
Potassic-fluoro-richterite
{K}{CaNa}{Mg
 
5
}(Si
 
8
O
 
22
)(F,OH)
 
2
Potassic-richterite
K[CaNa][Mg
 
5
]Si
 
8
O
 
22
(OH)
 
2
Richterite
{Na}{CaNa}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2

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 Potassic-ferro-richterite

Reference List:

- +
Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Amphiboles of the Khibiny Alkaline Pluton, Kola Peninsula, Russia. Geology of Ore Deposits 50(8), 720-731.

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

Internet Links for Potassic-ferro-richterite

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    • Localities for Potassic-ferro-richterite

    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.
    Canada
     
    • Nunavut Territory
      • Baffin Island
    		Hogarth (1997) Can. Min. 35, 53-78.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 720-731.
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