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
Member of:
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.
Classification of Oxo-mangani-leakeite
Physical Properties of Oxo-mangani-leakeite
Vitreous
Transparency:
Transparent
Colour:
red-orange
Tenacity:
Brittle
Cleavage:
Perfect
parallel to {110}
parallel to {110}
Density:
3.25 g/cm3 (Calculated)
Optical Data of Oxo-mangani-leakeite
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.
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-leakeite
Formula:
NaNa2(Mn3+4Li)Si8O22O2
Common Impurities:
Fe(III),K
Crystallography of Oxo-mangani-leakeite
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)°
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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-leakeite
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-leakeite
Relationship of Oxo-mangani-leakeite to other Species
Member of:
Other Members of this group:
| Ferri-fluoro-leakeite | {Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2 | Mon. 2/m : B2/m |
| Ferri-leakeite | [Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2 | Mon. |
| Ferro-ferri-fluoro-leakeite | Na(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2 | Mon. |
| Ferro-ferri-leakeite | [Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2 | Mon. |
| Ferro-fluoro-leakeite | NaNa2(Fe2+2Al2Li)(Si8O22)F2 | |
| Ferro-leakeite | NaNa2(Fe2+2Al2Li)(Si8O22)(OH)2 | |
| Fluoro-leakeite | NaNa2(Mg2Al2Li)(Si8O22)F2 | Mon. 2/m : B2/m |
| Leakeite | NaNa2(Mg2Al2Li)(Si8O22)(OH)2 | |
| Potassic-ferri-leakeite | [K][Na2][Mg2Fe3+2Li]Si8O22(OH)2 | Mon. 2/m : B2/m |
| Potassic-leakeite | KNa2(Mg2Al2Li)(Si8O22)(OH)2 | |
| Potassic-mangani-leakeite | [(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2 | Mon. |
Other Information
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-leakeite
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-leakeite
mindat.org URL:
https://www.mindat.org/min-46705.html
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Localities for Oxo-mangani-leakeite
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia (TL) | |
| 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. |