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Ferro-Ferri-tschermakite

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Formula:
☐{Ca
 
2
}{Fe
2+
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
Ferro-ferri-tschermakite is defined as a tschermakite group member with the following dominant elements:
C position: Fe as both the dominant divalent cation and trivalent cation.
W position: (OH) as the dominant anion
System:MonoclinicColour:greenish black
Hardness:5 - 6
Member of:Tschermakite Root Name Group > Calcium Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup
This page provides mineralogical data about Ferro-Ferri-tschermakite.

Classification of Ferro-Ferri-tschermakite

Strunz 8th edition ID:8/F.10-80

8 : Silicates
F : Inosilicates (chain and band) double chains [Si2O6]4-
10 : Amphibole group, Tremolite - Sadanagaite series
Hey's CIM Ref.:16.21.6

16 : Silicates Containing Aluminum and other Metals
21 : Aluminosilicates of Fe and Ca
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Physical Properties of Ferro-Ferri-tschermakite

Colour:greenish black
Hardness (Mohs):5 - 6
Cleavage:Distinct/Good

Crystallography of Ferro-Ferri-tschermakite

Crystal System:Monoclinic

Chemical Properties of Ferro-Ferri-tschermakite

Formula:
☐{Ca
 
2
}{Fe
2+
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2


Ferro-ferri-tschermakite is defined as a tschermakite group member with the following dominant elements:
C position: Fe as both the dominant divalent cation and trivalent cation.
W position: (OH) as the dominant anion
Simplified for copy/paste:☐{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2
Essential elements:Al, Ca, Fe, H, O, Si
All elements listed in formula:Al, Ca, Fe, H, O, Si

Relationship of Ferro-Ferri-tschermakite to other Species

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

- +
Ferri-fluoro-tschermakite
☐{Ca
 
2
}{Mg
 
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)F
 
2
Ferri-tschermakite
☐{Ca
 
2
}{Mg
 
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
Ferro-ferri-fluoro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)F
 
2
Ferro-fluoro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
2
}
(Al
 
2
Si
 
6
O
 
22
)F
 
2
Ferro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
Fluoro-tschermakite
☐{Ca
 
2
}{Mg
 
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)F
 
2
Tschermakite
☐(Ca
 
2
)(Mg
 
3
Al
 
2
)(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
Related Minerals - Strunz Grouping):

- +
8/F.10-05Parvo-manganotremolite
☐{CaMn
2+
 
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.10-10Tremolite
☐{Ca
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.10-12Fluoro-tremolite
☐{Ca
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)F
 
2
8/F.10-20Actinolite
☐{Ca
 
2
}{(Mg,Fe
2+
 
)
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.10-30Ferro-actinolite
☐{Ca
 
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.10-40Magnesio-hornblende
☐{Ca
 
2
}{Mg
 
4
Al}(AlSi
 
7
O
 
22
)(OH)
 
2
8/F.10-50Ferro-hornblende
☐{Ca
 
2
}{Fe
2+
4
Al}(AlSi
 
7
O
 
22
)(OH)
 
2
8/F.10-60Tschermakite
☐(Ca
 
2
)(Mg
 
3
Al
 
2
)(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-70Ferro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-77Ferri-tschermakite
☐{Ca
 
2
}{Mg
 
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-88Parvo-mangano-edenite
{Na}{CaMn
2+
 
}{Mg
 
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
8/F.10-90Edenite
{Na}{Ca
 
2
}{Mg
 
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
8/F.10-92Fluoro-edenite
{Na}{Ca
 
2
}{Mg
 
5
}(AlSi
 
7
O
 
22
)(F,OH)
 
2
8/F.10-100Ferro-edenite
{Na}{Ca
 
2
}{Fe
2+
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
8/F.10-102Potassic-ferro-chloro-edenite
{K}{Ca
 
2
}{Fe
2+
5
}(AlSi
 
7
O
 
22
)(Cl,OH)
 
2
8/F.10-103Cannilloite
Ca(Ca
 
2
)(Mg
 
4
Al)(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
8/F.10-105Fluoro-cannilloite
{Ca}{Ca
 
2
}{Mg
 
4
Al}(Al
 
3
Si
 
5
O
 
22
)(F,OH)
 
2
8/F.10-110Pargasite
{Na}{Ca
 
2
}{Mg
 
4
Al}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-112Fluoro-pargasite
{Na}{Ca
 
2
}{Mg
 
4
Al}(Al
 
2
Si
 
6
O
 
22
)(F,OH)
 
2
8/F.10-120Ferro-pargasite
{Na}{Ca
 
2
}{Fe
2+
4
Al}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-122Ferro-chloro-pargasite
NaCa
 
2
(Fe
2+
4
Al)(Al
 
2
Si
 
6
O
 
22
)Cl
 
2
8/F.10-125Potassic-pargasite
{K}{Ca
 
2
}{Mg
 
4
Al}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-127Potassic-chloro-pargasite
{K}{Ca
 
2
}{Mg
 
4
Al}(Al
 
2
Si
 
6
O
 
22
)(Cl,OH)
 
2
8/F.10-130Magnesio-hastingsite
{Na}{Ca
 
2
}{Mg
 
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-132Magnesio-fluoro-hastingsite
{Na}{Ca
 
2
}{Mg
 
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)F
 
2
8/F.10-135Potassic-magnesio-hastingsite
{K}{Ca
 
2
}{Mg
 
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-140Hastingsite
{Na}{Ca
 
2
}{Fe
2+
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
8/F.10-145Potassic-fluoro-hastingsite
{K}{Ca
 
2
}{Fe
2+
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(F,OH)
 
2
8/F.10-147Potassic-chloro-hastingsite
{K}{Ca
 
2
}{Fe
2+
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(Cl,OH)
 
2
8/F.10-150Kaersutite
{Na}{Ca
 
2
}{Mg
 
3
AlTi}(Al
 
2
Si
 
6
O
 
22
)O
 
2
8/F.10-160Ferro-kaersutite
{Na}{Ca
 
2
}{Fe
2+
3
AlTi}(Al
 
2
Si
 
6
O
 
22
)O
 
2
8/F.10-175Sadanagaite
{Na}{Ca
 
2
}{Mg
 
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
8/F.10-180Potassic-sadanagaite
{K}{Ca
 
2
}{Mg
 
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
8/F.10-200Potassic-ferro-sadanagaite
{K}{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
8/F.10-210Ferro-ferri-sadanagaite
NaCa
 
2
(Fe
2+
3
Fe
3+
2
)(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
8/F.10-220Potassic-ferro-ferri-sadanagaite
{K}{Ca
 
2
}{Fe
2+
3
Fe
3+
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
16.21.1Esseneite
CaFe
3+
 
[AlSiO
 
6
]
16.21.2Epidote
{Ca
 
2
}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
16.21.3Ferro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.4Ferro-aluminotschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.5Ferri-tschermakite
☐{Ca
 
2
}{Mg
 
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.7Alumino-ferro-hornblende
☐{Ca
 
2
}{Fe
2+
4
Al}(AlSi
 
7
O
 
22
)(OH)
 
2
16.21.8Pumpellyite-(Fe2+)
Ca
 
2
Fe
2+
 
Al
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
16.21.8Pumpellyite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O

Other Names for Ferro-Ferri-tschermakite

Synonyms:
Ferri-Ferrotschermakite
Other Languages:

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 Ferro-Ferri-tschermakite

Reference List:

- +
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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