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Glaucophane Root Name

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About Glaucophane Root NameHide

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.
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.


Chemical Properties of Glaucophane Root NameHide

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.

Crystallography of Glaucophane Root NameHide

Crystal System:
Monoclinic

Relationship of Glaucophane Root Name to other SpeciesHide

Other Members of this group:
Arfvedsonite Root NameANa2(Z2+4Fe3+}Si8O22(OH,F,Cl)2Mon.
Eckermannite Root NameANa2(Z2+4Al}Si8O22(OH,F,Cl)2Mon.
Leakeite Root NameANa2(Z2+2Z3+2Li)(Si8O22)(OH,F,Cl)2
Nybøite Root NameANa2(Z2+3Z3+2)(AlSi7O22)(OH,F,Cl)2
Riebeckite Root Name◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2Mon.
Group Members:
Ferro-fluoro-glaucophane ◻[Na2][Fe2+3Al2]Si8O22F2
Ferro-glaucophane ◻[Na2][Fe2+3Al2]Si8O22(OH)2Mon.
Fluoro-glaucophane ◻[Na2][Mg3Al2]Si8O22F2
Glaucophane ◻[Na2][Mg3Al2]Si8O22(OH)2Mon.

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.

Glaucophane Root Name in petrologyHide

References for Glaucophane Root NameHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ernst, W.G. (1963) Petrogenesis of glaucophane schists. Journal of Petrology: 4: 1-30.
Borg, I.Y. (1967) Optical properties and cell parameters in the glaucophane-riebeckite series: Contributions to Mineralogy and Petrology: 15: 67-92.
Papike, J.J., Clark, J.R. (1968) Cation distribution in the crystal structure of glaucophane; II: the high pressure polymorph. Geological Society of America Abstract, 1966: 157.
Papike, J.J., Clark, J.R. (1968) The crystal structure and cation distribution of glaucophane. American Mineralogist: 53: 1156-1173.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
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 Glaucophane Root NameHide

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