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Ferro-fluoro-leakeite

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Bernard Elgey Leake
Formula:
NaNa2(Fe2+2Al2Li)(Si8O22)F2
The Leakeite group minerals are sodium amphiboles defined with:
A(Na+K+2Ca)> 0.5 apfu,
C(Al+Fe3++2Ti) > 1.5 apfu and
CLi > 0,5 apfu

Ferro-fluoro-leakeite is defined with
A position: Na dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: F dominant
Name:
Ferro-fluoro-leakeite was first published as a new mineral by Hawthorne et.al (1996). The Leakeite group minerals was redefined in the 2012 amphibole nomenclature and the mineral described by Hawthorne et.al (1996) is now named ferro-ferri-fluoro-leakeite. The series root name was named in 1992 by Frank Christopher Hawthorne, Roberta Oberti, Luciano Ungaretti, and Joel Dennison Grice in honor of Scottish geologist Bernard Elgey Leake [1932-], University of Glasgow and who was chairman of the IMA subcommitte to revise amphibole nomenclature. The chemical suffix designates the chemical relationship in the series.
This page provides mineralogical data about Ferro-fluoro-leakeite.


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Classification of Ferro-fluoro-leakeiteHide

Discredited

Chemical Properties of Ferro-fluoro-leakeiteHide

Formula:
NaNa2(Fe2+2Al2Li)(Si8O22)F2

The Leakeite group minerals are sodium amphiboles defined with:
A(Na+K+2Ca)> 0.5 apfu,
C(Al+Fe3++2Ti) > 1.5 apfu and
CLi > 0,5 apfu

Ferro-fluoro-leakeite is defined with
A position: Na dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: F dominant

Relationship of Ferro-fluoro-leakeite to other SpeciesHide

Other Members of this group:
Ferri-fluoro-leakeite{Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2Mon. 2/m : B2/m
Ferri-leakeite[Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
Ferro-ferri-fluoro-leakeiteNa(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2Mon.
Ferro-ferri-leakeite[Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon.
Ferro-leakeiteNaNa2(Fe2+2Al2Li)(Si8O22)(OH)2
Fluoro-leakeiteNaNa2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
LeakeiteNaNa2(Mg2Al2Li)(Si8O22)(OH)2
Oxo-mangani-leakeiteNaNa2(Mn3+4Li)Si8O22O2Mon. 2/m : B2/m
Potassic-ferri-leakeite[K][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
Potassic-leakeiteKNa2(Mg2Al2Li)(Si8O22)(OH)2
Potassic-mangani-leakeite[(Na,K)][Na2][Mg2Mn3+2Li]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.

References for Ferro-fluoro-leakeiteHide

Reference List:
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Hawthorne, F.C., Oberti, R., Ungaretti, L., Ottolini, L., Grice, J.D., Czamanske, G.K. (1996) Fluor-ferro-leakeite, NaNa2(Fe2+2Fe3+2Li)Si8O22 F2, a new alkali amphibole from the Canada Pinabete pluton, Questa, New Mexico, U.S.A. American Mineralogist: 81: 226-228.
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 Ferro-fluoro-leakeiteHide

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