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Oxo-mangani-leakeite

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Bernard Elgey Leake
Formula:
NaNa2(Mn3+4Li)Si8O22O2
Colour:
red-orange
Lustre:
Vitreous
Specific Gravity:
3.25 (Calculated)
Crystal System:
Monoclinic
Name:
Named according to the recommended amphibole nomenclature. The root name is in honor of Scottish geologist Bernard Elgey Leake [1932-], University of Glasgow, who was chairman of the IMA subcommitte to revise amphibole nomenclature. The chemical prefixes designate the chemical relationship to other leakite-related minerals.
This page provides mineralogical data about Oxo-mangani-leakeite.


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Classification of Oxo-mangani-leakeiteHide

Approved
Approval Year:
2015
First Published:
2016

Physical Properties of Oxo-mangani-leakeiteHide

Vitreous
Transparency:
Transparent
Colour:
red-orange
Tenacity:
Brittle
Cleavage:
Perfect
parallel to {110}
Density:
3.25 g/cm3 (Calculated)

Optical Data of Oxo-mangani-leakeiteHide

Type:
Biaxial (-)
RI values:
nα = 1.681(2) nβ = 1.712(2) nγ = 1.738(2)
2V:
Measured: 81.0° (4), Calculated: 83.5°
Max Birefringence:
δ = 0.057
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Visible
Comments:
X = red brown, Y = Z orange red

Chemical Properties of Oxo-mangani-leakeiteHide

Formula:
NaNa2(Mn3+4Li)Si8O22O2
Common Impurities:
Fe(III),K

Crystallography of Oxo-mangani-leakeiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.875(5) Å, b = 17.873(9) Å, c = 5.295(2) Å
β = 104.74(3)°
Ratio:
a:b:c = 0.553 : 1 : 0.296
Unit Cell V:
903.8 ų
Z:
2
Morphology:
prismatic crystals

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.423(100)
4.461(40)
4.451(40)
3.377(46)
3.134(37)
2.734(25)
2.694(37)
2.282(27)
Comments:
From Type Description.

Type Occurrence of Oxo-mangani-leakeiteHide

Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, Ottawa, catalogue number CNMNC86895
Geological Setting of Type Material:
The Mn-rich rocks are submarine exhalative precipitates that were subsequently deformed and metamorphosed at upper middle to upper greenschist facies conditions

Synonyms of Oxo-mangani-leakeiteHide

Relationship of Oxo-mangani-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
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 Oxo-mangani-leakeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Oberti, R., Zanetti, A., Boiocchi, M., Hawthorne, F.C., Ball, N.A. (2015) Oxo-mangani-leakite, IMA 2015-035. CNMNC Newsletter No. 26, August 2015, page 945; Mineralogical Magazine: 79: 941-947.
Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Ashley, P.M. (2016) Oxo-mangani-leakeite from the Hoskins mine, New South Wales, Australia: occurrence and mineral description. Mineralogical Magazine: 80: 1013-1021.
Oberti, R., Della Ventura, G., Boiocchi, M., Zanetti, A., Hawthorne, F.C. (2016) The crystal chemistry of oxo-mangani-leakeite and mangano-mangani ungarettiite from the Hoskins mine and their impossible solid-solution: An XRD and FTIR study. Mineralogical Magazine: 81(3): 707-722.

Internet Links for Oxo-mangani-leakeiteHide

Localities for Oxo-mangani-leakeiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia (TL)
 
  • New South Wales
    • Forbes Co.
      • Grenfell
Oberti, R., Zanetti, A., Boiocchi, M., Hawthorne, F.C. and Ball, N.A. (2015) Oxo-mangani-leakite, IMA 2015-035. CNMNC Newsletter No. 26, August 2015, page 945; Mineralogical Magazine, 79, 941-947. ; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Ashley, P.M. (2016): Oxo-mangani-leakeite from the Hoskins mine, New South Wales, Australia: occurrence and mineral description. Mineralogical Magazine: 80: 1013-1021.
Mineral and/or Locality  
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