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Sodicgedrite

Formula:
[Na][Mg
 
2
][Mg
 
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
System:OrthorhombicColour:nd
Lustre:VitreousHardness:5½ - 6
Name:Named as a sodium-bearing, magnesium-dominant member of the gedrite series.


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

Classification of Sodicgedrite

IMA status:Approved
Strunz 8th edition ID:8/F.12-80
Nickel-Strunz 10th (pending) edition ID:9.DD.05

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles
Dana 8th edition ID:66.1.2.8

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup
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Physical Properties of Sodicgedrite

Lustre:Vitreous
Colour:nd
Streak:nd
Hardness (Mohs):5½ - 6

Crystallography of Sodicgedrite

Crystal System:Orthorhombic

Chemical Properties of Sodicgedrite

Formula:
[Na][Mg
 
2
][Mg
 
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
Essential elements:Al, H, Mg, Na, O, Si
All elements listed in formula:Al, H, Mg, Na, O, Si

Relationship of Sodicgedrite to other Species

Series:Forms a series with Sodic-ferrogedrite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
9.DD.05Ferro-anthophyllite
☐[Fe
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Ferrogedrite
☐[Fe
2+
2
][Fe
2+
3
Al
 
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Gedrite
☐[Mg
 
2
][Mg
 
3
Al
 
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Holmquistite
☐[Li
 
2
][Mg
 
3
Al
 
2
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Protoferro-anthophyllite
☐[Fe
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Protomangano-ferro-anthophyllite
☐[Mn
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodicanthophyllite
[Na][NaMg][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodic-ferro-anthophyllite
[Na][NaFe
2+
 
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Sodic-ferrogedrite
[Na][Fe
2+
2
][Fe
2+
4
Al][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
9.DD.05Ferroholmquistite
☐[Li
 
2
][Fe
2+
3
Al
 
2
][(OH)
 
2
|Si
 
8
O
 
22
]
9.DD.05Protoanthophyllite
☐[Mg
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]

Other Names for Sodicgedrite

Synonyms:
Na GedriteSodium Gedrite
Other Languages:
German:Na-Gedrit
Natriumgedrit
Spanish:Sodicgedrita

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 Sodicgedrite

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

Kanazawa, T., Tsunogae, T., Sato, K. & Santosh, M. (2008): The stability and origin of sodicgedrite in ultrahigh-temperature Mg-Al granulites: a case study from the Gondwana suture in southern India. Contributions to Mineralogy and Petrology, 157, 95-110

Internet Links for Sodicgedrite

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  • Raman and XRD data at RRUFF project
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    Localities for Sodicgedrite

    (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.
    Sweden
     
    • Västmanland
      • Nora
    		Kjell Gatedal
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 30th Oct 2009 07:08:11