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Sodic-ferrogedrite

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Formula:
{Na}{Fe
2+
2
}{Fe
2+
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
Formula is redefined in the 2012 amphibole nomenclature.
System:OrthorhombicLustre:Vitreous
Hardness:5½ - 6
Member of:Magnesium-iron-manganese Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup
Name:Named as the sodium-bearing and ferrous iron-dominant orthoamphibole resembling gedrite.


In order to better distinguish between amphibole end-member member compositions, the CNMNC has decided to rename sodic-ferrogedrite. The name is not yet (Nov 2012) decided.


Amphibole Group, Mg-Fe-Mn-Li Ortho-Amphibole Subgroup

Classification of Sodic-ferrogedrite

IMA status:Approved
Strunz 8th edition ID:8/F.12-90
Nickel-Strunz 10th (pending) edition ID:9.DD.05

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles
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Physical Properties of Sodic-ferrogedrite

Lustre:Vitreous
Hardness (Mohs):5½ - 6

Crystallography of Sodic-ferrogedrite

Crystal System:Orthorhombic

Chemical Properties of Sodic-ferrogedrite

Formula:
{Na}{Fe
2+
2
}{Fe
2+
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2


Formula is redefined in the 2012 amphibole nomenclature.
Essential elements:Al, Fe, H, Na, O, Si
All elements listed in formula:Al, Fe, H, Na, O, Si

Relationship of Sodic-ferrogedrite to other Species

Series:Forms a series with Sodicgedrite (see here)
Member of:Magnesium-iron-manganese Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup
Other Members of Group:

- +
Anthophyllite Group
☐{B
 
2
}{C
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
Cummingtonite
☐{Mg
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
Gedrite Group
☐{B
2+
2
}{C
2+
3
C
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
Grunerite
☐{Fe
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
Manganocummingtonite
☐{Mn
2+
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
Manganogrunerite
☐{Mn
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
Sodic-ferro-anthophyllite
{Na}{Fe
2+
2
}{Fe
2+
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
Sodicanthophyllite
{Na}{Mg
 
2
}{Mg
 
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
Sodicgedrite
{Na}{Mg
 
2
}{Mg
 
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
9.DD.05Ferro-anthophyllite
☐{Fe
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
9.DD.05Ferro-gedrite
☐{Fe
2+
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
9.DD.05Gedrite
☐{Mg
 
2
}{Mg
 
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
9.DD.05Holmquistite
☐{Li
 
2
}{Mg
 
3
Al
 
2
}(Si
 
8
O
 
22
)(OH)
 
2
9.DD.05Proto-mangano-ferro-anthophyllite
☐{Mn
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
9.DD.05Sodicanthophyllite
{Na}{Mg
 
2
}{Mg
 
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
9.DD.05Sodic-ferro-anthophyllite
{Na}{Fe
2+
2
}{Fe
2+
5
}(AlSi
 
7
O
 
22
)(OH)
 
2
9.DD.05Sodicgedrite
{Na}{Mg
 
2
}{Mg
 
3
Al
 
2
}(Al
 
3
Si
 
5
O
 
22
)(OH)
 
2
9.DD.05Ferro-holmquistite
☐{Li
 
2
}{Fe
2+
3
Al
 
2
}(Si
 
8
O
 
22
)(OH)
 
2
9.DD.05Proto-anthophyllite
☐{Mg
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2

Other Names for Sodic-ferrogedrite

Other Languages:
German:Natrium-Ferrogedrit

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 Sodic-ferrogedrite

Reference List:

- +
Hawthorne F.C. (1983), Canadian Mineralogist: 21: 173.

Mineralogical Record: 29: 169-174.

Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles: Canadian Mineralogist:
44(1): 1-21.

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 Sodic-ferrogedrite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
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    • Localities for Sodic-ferrogedrite

    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.
    Finland
     
    • Western and Inner Finland Region
      • Orivesi
    		Probed
    Spain
     
    • Andalusia
      • Málaga
        • Antequera
    		Christian Rewitzer collection
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