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Ferro-leakeite

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Bernard Elgey Leake
Formula:
NaNa2(Fe2+2Al2Li)(Si8O22)(OH)2
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-leakeite is defined with
A position: Na dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: (OH) dominant
Name:
Ferro-leakeite has been redefined in the 2012 amphibole nomenclature. Pre-2012, ferro-leakeite was defined as the Fe2+ and Fe3+ dominant mineral in the leakeite group. Today, the Fe2+ and Fe3+ dominant leakeit emineral is named ferro-ferri-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 prefix designates the chemical relationship in the series.
The element combination is only shared with ferro-pedrizite.


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Classification of Ferro-leakeiteHide

Notes:
Intermediate member of a solid-solution series

Chemical Properties of Ferro-leakeiteHide

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

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-leakeite is defined with
A position: Na dominant
C2+ position: Fe dominant
C3+ position: Al dominant
W position: (OH) dominant

Relationship of Ferro-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-fluoro-leakeiteNaNa2(Fe2+2Al2Li)(Si8O22)F2
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-leakeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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-leakeiteHide

Mineral and/or Locality  
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