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).

Classification of SodicgedriteHide

Notes:

Unnamed (probably valid)

Approval History:

Unnamed, but probably valid.

Strunz 8th ed.:

8/F.12-80

Nickel-Strunz 10th (pending) ed.:

9.DD.05

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

Dana 8th ed.:

66.1.2.8

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

Physical Properties of SodicgedriteHide

Lustre:

Vitreous

Colour:

Streak:

Hardness:

5½ - 6 on Mohs scale

Chemical Properties of SodicgedriteHide

Formula:

{Na}{Mg₂}{Mg₃Al₂}(Al₃Si₅O₂₂)(OH)₂

Formula is redefined in the 2012 amphibole nomenclature.

Elements listed:

Al, H, Mg, Na, O, Si - search for minerals with similar chemistry

Crystallography of SodicgedriteHide

Crystal System:

Orthorhombic

Synonyms of SodicgedriteHide

Na Gedrite

Sodium Gedrite

Other Language Names for SodicgedriteHide

German:Na-Gedrit
Natriumgedrit

Spanish:Sodicgedrita

Relationship of Sodicgedrite to other SpeciesHide

Member of:

Magnesium-iron-manganese Amphibole Subgroup > w(OH, F, Cl)-dominant Amphibole Group > Amphibole Supergroup

Other Members of this group:

Anthophyllite Root Name	☐{X₂}{Z₅}(Si₈O₂₂)(OH)₂
Cummingtonite	☐{Mg₂}{Mg₅}(Si₈O₂₂)(OH)₂	Mon.
Gedrite Root Name	☐{X²⁺₂}{Z²⁺₃Z³⁺₂}(Al₂Si₆O₂₂)(OH)₂	Orth.
Grunerite	☐{Fe²⁺₂}{Fe²⁺₅}(Si₈O₂₂)(OH)₂	Mon. 2/m : B2/m
Sodic-ferro-anthophyllite	{Na}{Fe²⁺₂}{Fe²⁺₅}(AlSi₇O₂₂)(OH)₂	Orth.
Sodic-ferrogedrite	{Na}{Fe²⁺₂}{Fe²⁺₃Al₂}(Al₃Si₅O₂₂)(OH)₂	Orth.
Sodicanthophyllite	{Na}{Mg₂}{Mg₅}(AlSi₇O₂₂)(OH)₂	Orth.
Suenoite Root Name	☐{X₂}{Z₅}(Si₈O₂₂)(OH)₂

Forms a series with:

Sodic-ferrogedrite

Sodic-ferrogedrite-Sodicgedrite Series

Common AssociatesHide

Associated Minerals Based on Photo Data:

1 photo of Sodicgedrite associated with Rutile	TiO₂
1 photo of Sodicgedrite associated with Orthopyroxene Subgroup

Related Minerals - Nickel-Strunz Grouping Hide

9.DD.05	Anthophyllite	☐{Mg₂}{Mg₅}(Si₈O₂₂)(OH)₂	Orth. mmm (2/m 2/m 2/m) : Pnma
9.DD.05	Ferro-anthophyllite	☐{Fe²⁺₂}{Fe²⁺₅}(Si₈O₂₂)(OH)₂	Orth.
9.DD.05	Ferro-gedrite	☐{Fe²⁺₂}{Fe²⁺₃Al₂}(Al₂Si₆O₂₂)(OH)₂	Orth.
9.DD.05	Gedrite	☐{Mg₂}{Mg₃Al₂}(Al₂Si₆O₂₂)(OH)₂	Orth.
9.DD.05	Holmquistite	☐{Li₂}{Mg₃Al₂}(Si₈O₂₂)(OH)₂	Orth.
9.DD.05	Proto-ferro-suenoite	☐{Mn²⁺₂}{Fe²⁺₅}(Si₈O₂₂)(OH)₂	Orth.
9.DD.05	Sodicanthophyllite	{Na}{Mg₂}{Mg₅}(AlSi₇O₂₂)(OH)₂	Orth.
9.DD.05	Sodic-ferro-anthophyllite	{Na}{Fe²⁺₂}{Fe²⁺₅}(AlSi₇O₂₂)(OH)₂	Orth.
9.DD.05	Sodic-ferrogedrite	{Na}{Fe²⁺₂}{Fe²⁺₃Al₂}(Al₃Si₅O₂₂)(OH)₂	Orth.
9.DD.05	Ferro-holmquistite	☐{Li₂}{Fe²⁺₃Al₂}(Si₈O₂₂)(OH)₂	Orth.
9.DD.05	Proto-anthophyllite	☐{Mg₂}{Mg₅}(Si₈O₂₂)(OH)₂	Orth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Dana Grouping (8th Ed.)Hide

66.1.2.1	Anthophyllite	☐{Mg₂}{Mg₅}(Si₈O₂₂)(OH)₂	Orth. mmm (2/m 2/m 2/m) : Pnma
66.1.2.5	Gedrite	☐{Mg₂}{Mg₃Al₂}(Al₂Si₆O₂₂)(OH)₂	Orth.
66.1.2.9	Holmquistite	☐{Li₂}{Mg₃Al₂}(Si₈O₂₂)(OH)₂	Orth.

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

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https://www.mindat.org/min-7305.html
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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.


Australia
Western Australia Coolgardie Shire Spargoville ⓘ Wattle Dam	John Walshe, 2018, key elements in the formation of progenitor gold deposits: lessons from the Yilgarn. Garry Davidson symposium. Unpublished Presentation, CODES. University of Tasmania

Norway
Aust-Agder Arendal ⓘ Ærøya	Jan Kihle photo and pers. commentary 2010
Buskerud Øvre Eiker Kjennerudvannet North Kjennerudvann Silver Mine ⓘ Anthophyllite typelocality	Kullerud, K., Altenberger, U., Andersen, T., Friis, H., Günter, C. & Ribacki, E. (2019) The anthophyllite that wasn't anthophyllite - from the anthophyllite type locality at the Kjennerudvann lake, Kongsberg, Norway. Norsk Mineralsymposium 2019: 110-115
Vestland Stad Selje Årsheim ⓘ Årsheimneset eclogite pod	Smith, D. S.(1988): Eclogites and Eclogite Facies Rocks. Elsevier Science Limited, 1988. 524p. (p.51)

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Sodicgedrite

About SodicgedriteHide