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Gedrite Root Name

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About Gedrite Root NameHide

Formula:
☐{X2+2}{Z2+3Z3+2}(Al2Si6O22)(OH)2
The gedrite minerals are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup defined with A(Na+K+2Ca)<0.5 apfu and Z(Al+Fe3++2Ti)>1 apfu.

The individual minerals are defined based on their dominant elements in the X (= IMA B position), Z2+ and Z3+ positions (= IMA C2+ and C3+ positions).

In mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
Crystal System:
Orthorhombic
Name:
Named after the type locality at Gèdres, Héas Valley, France
This page provides mineralogical data about Gedrite Root Name.


Chemical Properties of Gedrite Root NameHide

Formula:
☐{X2+2}{Z2+3Z3+2}(Al2Si6O22)(OH)2

The gedrite minerals are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup defined with A(Na+K+2Ca)<0.5 apfu and Z(Al+Fe3++2Ti)>1 apfu.

The individual minerals are defined based on their dominant elements in the X (= IMA B position), Z2+ and Z3+ positions (= IMA C2+ and C3+ positions).

In mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.

Crystallography of Gedrite Root NameHide

Crystal System:
Orthorhombic

Relationship of Gedrite Root Name to other SpeciesHide

Other Members of this group:
Anthophyllite Root Name☐{X2}{Z5}(Si8O22)(OH)2
Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2Mon.
Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
Sodic-ferro-anthophyllite{Na}{Fe2+2}{Fe2+5}(AlSi7O22)(OH)2Orth.
Sodic-ferrogedrite{Na}{Fe2+2}{Fe2+3Al2}(Al3Si5O22)(OH)2Orth.
Sodicanthophyllite{Na}{Mg2}{Mg5}(AlSi7O22)(OH)2Orth.
Sodicgedrite{Na}{Mg2}{Mg3Al2}(Al3Si5O22)(OH)2Orth.
Suenoite Root Name☐{X2}{Z5}(Si8O22)(OH)2
Group Members:
Ferro-gedrite ☐{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2Orth.
Gedrite ☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2Orth.
Minerals chemically related to group:
Anthophyllite Root Name☐{X2}{Z5}(Si8O22)(OH)2

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 Gedrite Root NameHide

Reference List:
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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 Gedrite Root NameHide

Mineral and/or Locality  
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