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Formula is redefined in the 2012 amphibole nomenclature.
5½ - 6
Crystal System:
Named as the sodium-bearing and magnesium-dominant orthoamphibole resembling gedrite.

In order to better distinguish between amphibole end-member member compositions, the CNMNC has decided to rename sodic-gedrite. The name is not yet (Nov 2012) decided.
Amphibole Group, Mg-Fe-Mn-Li Ortho-Amphibole Subgroup.

Indicator mineral for Ultra High temperature (UHT) granulite facies metamorphism in Mg-Al rich rocks (e.g., metapelites).

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Classification of SodicgedriteHide

Unnamed (probably valid)
Approval History:
Unnamed, but probably valid.

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles

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

Physical Properties of SodicgedriteHide

5½ - 6 on Mohs scale

Chemical Properties of SodicgedriteHide


Formula is redefined in the 2012 amphibole nomenclature.

Crystallography of SodicgedriteHide

Crystal System:

Synonyms of SodicgedriteHide

Other Language Names for SodicgedriteHide

Relationship of Sodicgedrite to other SpeciesHide

Other Members of this group:
Anthophyllite Root Name☐{X2}{Z5}(Si8O22)(OH)2
Gedrite Root Name☐{X2+2}{Z2+3Z3+2}(Al2Si6O22)(OH)2Orth.
Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
Manganocummingtonite☐{Mn2+2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
Suenoite Root Name☐{X2}{Z5}(Si8O22)(OH)2
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Rutile1 photo of Sodicgedrite associated with Rutile on
Orthopyroxene Subgroup1 photo of Sodicgedrite associated with Orthopyroxene Subgroup on

Related Minerals - Nickel-Strunz GroupingHide

9.DD.05Proto-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m)

Related Minerals - Dana Grouping (8th Ed.)Hide☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2Orth.☐{Li2}{Mg3Al2}(Si8O22)(OH)2Orth.

Other InformationHide

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 SodicgedriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hawthorne F.C. (1983) The crystal chemistry of the amphiboles. The Canadian Mineralogist: 21: 173-480.
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 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.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for SodicgedriteHide

Localities for SodicgedriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Aust-Agder
    • Arendal
Jan Kihle photo and pers. commentary 2010
  • Sogn og Fjordane
    • Selje
      • Årsheim
Smith, D. S.(1988): Eclogites and Eclogite Facies Rocks. Elsevier Science Limited, 1988. 524p. (p.51)
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