Glaucophane Root Name Group
A group of related mineral species
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About Glaucophane Root Name Group
Formula:
◻[Na2][Z2+3Al2]Si8O22(OH,F,Cl)2
The glaucophane minerals are sodium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < Z(Al+Fe3++2Ti) with Al as the dominant element in the Z3+ position (= IMA C3+ position).
The individual minerals are defined by the dominant elements in the Z2+ (= IMA C2+ ) and W positions. The most common dominant elements in the various positions are:
Z2+ position (= IMA C2+ position): Mg or Fe2+ dominant
W position: (OH) or F dominant
On 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 by the dominant elements in the Z2+ (= IMA C2+ ) and W positions. The most common dominant elements in the various positions are:
Z2+ position (= IMA C2+ position): Mg or Fe2+ dominant
W position: (OH) or F dominant
On 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:
Monoclinic
Name:
From the Greek γλαυκός for "sky-blue" and φαίνεσθαι "to appear", in allusion to its colour.
This page provides mineralogical data about Glaucophane Root Name Group.
Unique Identifiers
Mindat ID:
8962
Long-form identifier:
mindat:1:1:8962:9
GUID
(UUID V4):
(UUID V4):
f9411fbb-e538-465d-8216-5e560151d421
Chemistry of Glaucophane Root Name Group
Mindat Formula:
◻[Na2][Z2+3Al2]Si8O22(OH,F,Cl)2
The glaucophane minerals are sodium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < Z(Al+Fe3++2Ti) with Al as the dominant element in the Z3+ position (= IMA C3+ position).
The individual minerals are defined by the dominant elements in the Z2+ (= IMA C2+ ) and W positions. The most common dominant elements in the various positions are:
Z2+ position (= IMA C2+ position): Mg or Fe2+ dominant
W position: (OH) or F dominant
On 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 glaucophane minerals are sodium amphiboles defined with A(Na+K+2Ca)< 0.5 apfu and 1.5 apfu < Z(Al+Fe3++2Ti) with Al as the dominant element in the Z3+ position (= IMA C3+ position).
The individual minerals are defined by the dominant elements in the Z2+ (= IMA C2+ ) and W positions. The most common dominant elements in the various positions are:
Z2+ position (= IMA C2+ position): Mg or Fe2+ dominant
W position: (OH) or F dominant
On 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 Glaucophane Root Name Group
Crystal System:
Monoclinic
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) |
---|---|---|---|---|---|---|---|
0000182 | Glaucophane | Papike J J, Clark J R (1968) The crystal structure and cation distribution of glaucophane American Mineralogist 53 1156-1173 | 1968 | 0 | 293 | ||
0006415 | Glaucophane | Comodi P, Mellini M, Ungaretti L, Zanazzi P F (1991) Compressibility and high pressure structure refinement of tremolite, pargasite and glaucophane European Journal of Mineralogy 3 485-499 | 1991 | 0 | 293 | ||
0006416 | Glaucophane | Comodi P, Mellini M, Ungaretti L, Zanazzi P F (1991) Compressibility and high pressure structure refinement of tremolite, pargasite and glaucophane European Journal of Mineralogy 3 485-499 | 1991 | 0 | 293 | ||
0006417 | Glaucophane | Comodi P, Mellini M, Ungaretti L, Zanazzi P F (1991) Compressibility and high pressure structure refinement of tremolite, pargasite and glaucophane European Journal of Mineralogy 3 485-499 | 1991 | 0 | 293 |
CIF Raw Data - click here to close
Synonyms of Glaucophane Root Name Group
Sodic amphibole (in part)
Relationship of Glaucophane Root Name Group to other Species
Other Members of this group:
Arfvedsonite Root Name Group | ANa2(Z2+4Fe3+}Si8O22(OH,F,Cl)2 | Mon. |
Eckermannite Root Name Group | ANa2(Z2+4Al}Si8O22(OH,F,Cl)2 | Mon. |
Leakeite Root Name Group | ANa2(Z2+2Z3+2Li)(Si8O22)(OH,F,Cl)2 | |
Nybøite Root Name Group | ANa2(Z2+3Z3+2)(AlSi7O22)(OH,F,Cl)2 | |
Riebeckite Root Name Group | ◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2 | Mon. |
Group Members:
Ferro-glaucophane | ◻[Na2][Fe2+3Al2]Si8O22(OH)2 | Mon. 2/m : B2/m |
Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 | Mon. 2/m : B2/m |
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.
Glaucophane 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 Glaucophane Root Name Group
mindat.org URL:
https://www.mindat.org/min-8962.html
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Please feel free to link to this page.
Search Engines:
Rio Oremo, Chiavolino, Pollone, Biella Province, Piedmont, Italy