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Ferri-katophorite

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Big Photo

Northeast slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Pavel M. Kartashov

Show Ferri-katophorite Photos (4)



Formula:
Na(CaNa)(Mg
 
4
Fe
3+
 
)(AlSi
 
7
O
 
22
)(OH)
 
2
The katophorite group minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu.

Ferri-katophorite is defined with

A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: (OH) dominant
Member of:Katophorite Group > Sodium-Calcium Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup


The kataphorite group species with with Mg and Fe3+>Al in the C position was named magnesio-ferrikatophorite in the 1978 and 1997 amphibole nomenclatures. The katophorite group minerals was redefined in the 2012 amphibole nomenclature renaming the Mg, Fe3+ and (OH) dominant member of the group ferri-katophorite.

Classification of Ferri-katophorite

IMA status:Redefined Approved 2012
Hey's CIM Ref.:16.24.4

16 : Silicates Containing Aluminum and other Metals
24 : Aluminosilicates of Fe, Mg, Ca and alkalis
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Optical Data of Ferri-katophorite

Type:Biaxial (-)
RI values: nα = 1.640 - 1.681 nβ = 1.658 - 1.688 nγ = 1.660 - 1.692
2V:Calculated: 36° to 72°
Maximum Birefringence:δ = 0.020

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

Chemical Properties of Ferri-katophorite

Formula:
Na(CaNa)(Mg
 
4
Fe
3+
 
)(AlSi
 
7
O
 
22
)(OH)
 
2


The katophorite group minerals are sodium-calcium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu.

Ferri-katophorite is defined with

A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
W position: (OH) dominant
Essential elements:Al, Ca, Fe, H, Mg, Na, O, Si
All elements listed in formula:Al, Ca, Fe, H, Mg, Na, O, Si

Relationship of Ferri-katophorite to other Species

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

- +
Ferri-fluoro-katophorite
Na(CaNa)(Mg
 
4
Fe
3+
 
)(AlSi
 
7
O
 
22
)F
 
2
Ferro-ferri-fluoro-katophorite
Na(CaNa)(Fe
2+
4
Fe
3+
 
)(AlSi
 
7
O
 
22
)F
 
2
Ferro-ferri-katophorite
NaCaNaFe
2+
4
(Fe
3+
 
)[(AlSi
 
7
)O
 
22
](OH)
 
2
Ferro-fluoro-katophorite
Na(CaNa)(Fe
2+
4
Al)(AlSi
 
7
O
 
22
)F
 
2
Ferro-katophorite
{Na}{CaNa}{Fe
2+
4
Al}[(AlSi
 
7
)O
 
22
](OH)
 
2
Fluoro-katophorite
Na(CaNa)(Mg
 
4
Al)(AlSi
 
7
O
 
22
)F
 
2
Katophorite
{Na}{CaNa}{Mg
 
4
Al}[(AlSi
 
7
)O
 
22
](OH)
 
2
Potassic-ferri-katophorite
K(CaNa)(Mg
 
4
Fe
3+
 
)(AlSi
 
7
O
 
22
)(OH)
 
2
Potassic-fluoro-katophorite
K(CaNa)(Mg
 
4
Al)(AlSi
 
7
O
 
22
)F
 
2
Related Minerals - Hey's Index Grouping:

- +
16.24.1Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
16.24.2Omphacite
(Ca,Na)(Mg,Al)Si
 
2
O
 
6
16.24.5Ferro-ferri-katophorite
NaCaNaFe
2+
4
(Fe
3+
 
)[(AlSi
 
7
)O
 
22
](OH)
 
2
16.24.6Barroisite
☐{CaNa}{Mg
 
3
Al
 
2
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.7Ferri-barroisite
☐(CaNa)(Mg
 
3
Fe
3+
2
)(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.8Alumino-ferrobarroisite
☐{CaNa}{Fe
2+
3
Al
 
2
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.9Ferro-barroisite
☐{CaNa}{Fe
2+
3
Al
 
2
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.10Ferro-ferri-barroisite
☐(CaNa)(Fe
2+
3
Fe
3+
2
)(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.11Hastingsite
{Na}{Ca
 
2
}{Fe
2+
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.12Magnesio-hastingsite
{Na}{Ca
 
2
}{Mg
 
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.13Taramite Group
A(CaNa)(Z
2+
3
Z
3+
2
)(Al
 
2
Si
 
6
O
 
22
)((OH),F,Cl)
 
2
16.24.14Ferri-taramite
Na(CaNa)(Mg
 
3
Fe
3+
2
)(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.15Magnesiotaramite
{Na}{CaNa}{Mg
 
3
AlFe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.16Osumilite-(Mg)
KMg
 
2
Al
 
3
(Al
 
2
Si
 
10
)O
 
30
16.24.16Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30

Other Names for Ferri-katophorite

Synonyms:
Magnesio-ferrikatophorite
Other Languages:
German:Magnesioferrikatophorit
Spanish:Magnesioferrikatophorita

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 Ferri-katophorite

Reference List:

- +
LEAKE, B,E. (1978): Nomenclature of amphiboles. Am. Mineral.63, 1023-1052.

LEAKE, B,E. WOOLLEY, A.R., ARPS, C.E.S., BIRCH, W.D., GILBERT,M.C., GRICE, J.D., HAWTHORNE, F.C., KATO, A.,KISCH, H.J., KRIVOVICHEV, V.G., LINTHOUT, K., LAIRD, J.,
MANDARINO, J.A., MARESCH, W.V., NICKEL, E.H., ROCK,N.M.S., SCHUMACHER, J.C., SMITH, D.C., STEPHENSON,N.C.N., UNGARETTI, L., WHITTAKER, E.J.W. & GUO,YOUZHI (1997):Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Can. Mineral. 35, 219-246.

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

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    • Localities for Ferri-katophorite

    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.
    Hide Locality List
    (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
     
    • Québec
      • Abitibi-Témiscamingue
        • Témiscamingue RCM
          • Les Lacs-du-Témiscamingue
    Chile
     
    • Valparaíso Region
      • Los Andes Province
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Kukisvumchorr Mt
    		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.
    Pavel M. Kartashov analytical data
    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.
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
    		Pavel M. Kartashov analytical data, material of Alexei Kuznetsov
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