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Ferro-Ferri-tschermakite

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Formula:
☐{Ca2}{Fe32+Fe23+}(Al2Si6O22)(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:
Monoclinic
Colour:
greenish black
Hardness:
5 - 6
This page provides mineralogical data about Ferro-Ferri-tschermakite.

Classification of Ferro-Ferri-tschermakite

8/F.10-80

8 : Silicates
F : Inosilicates (chain and band) double chains [Si2O6]4-
10 : Amphibole group, Tremolite - Sadanagaite series
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:
☐{Ca2}{Fe32+Fe23+}(Al2Si6O22)(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
Essential elements:
All elements listed in formula:

Relationship of Ferro-Ferri-tschermakite to other Species

Other Members of Group:
Ferri-fluoro-tschermakite☐{Ca2}{Mg3Fe23+}(Al2Si6O22)F2
Ferri-tschermakite☐{Ca2}{Mg3Fe23+}(Al2Si6O22)(OH)2
Ferro-ferri-fluoro-tschermakite☐{Ca2}{Fe32+Fe23+}(Al2Si6O22)F2
Ferro-fluoro-tschermakite☐{Ca2}{Fe32+Al}2(Al2Si6O22)F2
Ferro-tschermakite☐{Ca2}{Fe32+Al2}(Al2Si6O22)(OH)2
Fluoro-tschermakite☐{Ca2}{Mg3Al2}(Al2Si6O22)F2
Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2
8/F.10-05Parvo-manganotremolite☐{CaMn2+}{Mg5}(Si8O22)(OH)2
8/F.10-10Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
8/F.10-12Fluoro-tremolite☐{Ca2}{Mg5}(Si8O22)F2
8/F.10-20Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
8/F.10-30Ferro-actinolite☐{Ca2}{Fe52+}(Si8O22)(OH)2
8/F.10-40Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
8/F.10-50Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
8/F.10-60Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2
8/F.10-70Ferro-tschermakite☐{Ca2}{Fe32+Al2}(Al2Si6O22)(OH)2
8/F.10-77Ferri-tschermakite☐{Ca2}{Mg3Fe23+}(Al2Si6O22)(OH)2
8/F.10-88Parvo-mangano-edenite{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2
8/F.10-90Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
8/F.10-92Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
8/F.10-100Ferro-edenite{Na}{Ca2}{Fe52+}(AlSi7O22)(OH)2
8/F.10-102Potassic-ferro-chloro-edenite{K}{Ca2}{Fe52+}(AlSi7O22)(Cl,OH)2
8/F.10-103CannilloiteCa(Ca2)(Mg4Al)(Al3Si5O22)(OH)2
8/F.10-105Fluoro-cannilloite{Ca}{Ca2}{Mg4Al}(Al3Si5O22)(F,OH)2
8/F.10-110Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
8/F.10-112Fluoro-pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(F,OH)2
8/F.10-120Ferro-pargasite{Na}{Ca2}{Fe42+Al}(Al2Si6O22)(OH)2
8/F.10-122Ferro-chloro-pargasiteNaCa2(Fe42+Al)(Al2Si6O22)Cl2
8/F.10-125Potassic-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
8/F.10-127Potassic-chloro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(Cl,OH)2
8/F.10-130Magnesio-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2
8/F.10-132Fluoro-magnesio-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)F2
8/F.10-135Potassic-magnesio-hastingsite{K}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2
8/F.10-140Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
8/F.10-145Potassic-fluoro-hastingsite{K}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(F,OH)2
8/F.10-147Potassic-chloro-hastingsite{K}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(Cl,OH)2
8/F.10-150Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
8/F.10-160Ferro-kaersutite{Na}{Ca2}{Fe32+AlTi}(Al2Si6O22)O2
8/F.10-175Sadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2
8/F.10-180Potassic-sadanagaite{K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2
8/F.10-200Potassic-ferro-sadanagaite{K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2
8/F.10-210Ferro-ferri-sadanagaiteNaCa2(Fe32+Fe23+)(Al3Si5O22)(OH)2
8/F.10-220Potassic-ferro-ferri-sadanagaite{K}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2
16.21.1EsseneiteCaFe3+[AlSiO6]
16.21.2Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
16.21.3Ferro-tschermakite☐{Ca2}{Fe32+Al2}(Al2Si6O22)(OH)2
16.21.4Ferro-aluminotschermakite☐{Ca2}{Fe32+Al2}(Al2Si6O22)(OH)2
16.21.5Ferri-tschermakite☐{Ca2}{Mg3Fe23+}(Al2Si6O22)(OH)2
16.21.7Alumino-ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
16.21.8Pumpellyite-(Fe2+)Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2O
16.21.8Pumpellyite-(Fe3+)Ca2(Fe3+,Mg,Fe2+)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2O

Other Names for Ferro-Ferri-tschermakite

Name in Other Languages:

Other Information

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 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

Internet Links for Ferro-Ferri-tschermakite

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