Gedrite Root Name Group
A group of related mineral species
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About Gedrite Root Name Group
Formula:
â—»{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.
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
Member of:
Name:
Named after the type locality at Gèdres, Héas Valley, France
This page provides mineralogical data about Gedrite Root Name Group.
Unique Identifiers
Mindat ID:
8963
Long-form identifier:
mindat:1:1:8963:6
GUID
(UUID V4):
(UUID V4):
0e318422-52bc-4b79-98eb-ad21be4e59d2
Chemistry of Gedrite Root Name Group
Mindat Formula:
â—»{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.
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 Name Group
Crystal System:
Orthorhombic
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000215 | Gedrite | Papike J J, Ross M (1970) Gedrites: Crystal structures and intracrystalline cation distributions sample 001 American Mineralogist 55 1945-1972 |  | 1970 | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Gedrite Root Name Group to other Species
Member of:
Other Members of this group:
| Anthophyllite Root Name Group | â—»{X2}{Z5}(Si8O22)(OH)2 | Orth. |
| Cummingtonite | â—»{Mg2}{Mg5}(Si8O22)(OH)2 | Mon. 2/m : B2/m |
| Grunerite | â—»{Fe2+2}{Fe2+5}(Si8O22)(OH)2 | Mon. 2/m : B2/m |
| Papikeite Root Name Group | NaX2+2(Z2+3Al2)(Si5Al3)O22(OH)2 | |
| Suenoite Root Name Group | â—»{X2}{Z5}(Si8O22)(OH)2 |
Group Members:
| Ferro-gedrite | â—»{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2 | Orth. mmm (2/m 2/m 2/m) : Pnma |
| Gedrite | â—»{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2 | Orth. mmm (2/m 2/m 2/m) |
Minerals chemically related to group:
| Anthophyllite Root Name Group | â—»{X2}{Z5}(Si8O22)(OH)2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Gedrite Root Name Group in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Gedrite Root Name Group
mindat.org URL:
https://www.mindat.org/min-8963.html
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References for Gedrite Root Name Group
Skisshyttan, Smedjebacken, Dalarna County, Sweden