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Potassic-leakeite

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Bernard Elgey Leake
Formula:
KNa2(Mg2Al2Li)(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

Potassic-leakeite is defined with
A position: K dominant
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
Name:
Potassic-leakeite was first published as a new mineral by Matsubara et.al 2002. The Leakeite group minerals was redefined in the 2012 amphibole nomenclature and the mineral described by Matsubara et.al. (2002) is now named potassic-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.
This page provides mineralogical data about Potassic-leakeite.


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Classification of Potassic-leakeiteHide

Notes:
Intermediate member of a solid-solution series

Chemical Properties of Potassic-leakeiteHide

Formula:
KNa2(Mg2Al2Li)(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

Potassic-leakeite is defined with
A position: K dominant
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant

Relationship of Potassic-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
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-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 Potassic-leakeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Matsubara, S., Miyawaki, R., Kurosawa, M., Suzuki, Y. (2002) Potassicleakeite, a new amphibole from the Tanohata mine, Iwate Prefecture, Japan. Journal of Mineralogical and Petrological Sciences: 97: 177-184.
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 Potassic-leakeiteHide

Mineral and/or Locality  
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