Leisingite
A valid IMA mineral species
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About Leisingite
Formula:
Cu2MgTe6+O6 · 6H2O
the "Mindat formula" is correct, as supported by the 2019 IMA redefinition
Colour:
Pale yellow to pale orange-yellow
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
3.41 (Calculated)
Crystal System:
Trigonal
Name:
Named by A.C. Roberts et al. in 1996 in honor of Joseph F. Leising (1949-), geologist and mineral collector of Reno, Nevada, USA, who helped collect the first known specimens.
Type Locality:
Unique Identifiers
Mindat ID:
7151
Long-form identifier:
mindat:1:1:7151:8
Similar Names
| Lessingit | A synonym of 'Lessingite-(Ce)' |
| Lessingite-(Ce) | A synonym of Britholite-(Ce) |
| Lusungite | A synonym of Goyazite |
IMA Classification of Leisingite
Approved
IMA Formula:
Cu2+2MgTe6+O6·6H2O
Approval year:
1995
First published:
1996
Approval history:
redefinition confirmed within the IMA Newsletter no. 52
Classification of Leisingite
4.FL.65
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Lei | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Leisingite
Vitreous
Transparency:
Transparent, Translucent
Comment:
somewhat satiny to frosted
Colour:
Pale yellow to pale orange-yellow
Streak:
Pale yellow
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Irregular/Uneven
Comment:
somewhat flexible
Density:
3.41 g/cm3 (Calculated)
Optical Data of Leisingite
Type:
Uniaxial (-)
RI values:
nω = 1.803 nε = 1.581
Max. Birefringence:
δ = 0.222
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Chemistry of Leisingite
Mindat Formula:
Cu2MgTe6+O6 · 6H2O
the "Mindat formula" is correct, as supported by the 2019 IMA redefinition
the "Mindat formula" is correct, as supported by the 2019 IMA redefinition
Element Weights:
Common Impurities:
Fe
Crystallography of Leisingite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 5.305(1) Å, c = 9.693(6) Å
Ratio:
a:c = 1 : 1.827
Unit Cell V:
236.2 ų
Z:
1
Morphology:
{001} is the major form and {100} and {110} are minute forms
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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View
CIF File Best | x | y | z | a | b | c
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Labels
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005525 | Leisingite | Margison S M, Grice J D, Groat L A (1997) The crystal structure of leisingite, (Cu,Mg,Zn)2(Mg,Fe)TeO6.6H2O The Canadian Mineralogist 35 759-763 |  | 1997 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.70 Å | (100) |
| 4.834 Å | (80) |
| 4.604 Å | (60) |
| 2.655 Å | (60) |
| 2.556 Å | (70) |
| 2.326 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Leisingite
General Appearance of Type Material:
isolated hexagonal-shaped very thin plates or foliated masses; rarely as clusters of crystals; individual crystals, subhedral to euhedral, are less than 0.1 mm on average
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Canada, 67882.
Geological Setting of Type Material:
small vugs of crumbly to drusy white to colourless quartz, within the dump material
Associated Minerals at Type Locality:
Synonyms of Leisingite
Other Language Names for Leisingite
Common Associates
Associations Based on Photo Data:
| 18 photos of Leisingite associated with Quartz | SiO2 |
| 9 photos of Leisingite associated with Eurekadumpite | (Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18 · 7H2O |
| 6 photos of Leisingite associated with Utahite | MgCu4Zn2Te6+3O14(OH)4 · 6H2O |
| 2 photos of Leisingite associated with Goethite | Fe3+O(OH) |
| 2 photos of Leisingite associated with Calcite | CaCO3 |
| 1 photo of Leisingite associated with Xocolatlite | Ca2Mn4+2(Te6+O6)2 · H2O |
| 1 photo of Leisingite associated with Mcalpineite | Cu3(Te6+O6) |
| 1 photo of Leisingite associated with Dugganite | Pb3Zn3(AsO4)2(TeO6) |
| 1 photo of Leisingite associated with Malachite | Cu2(CO3)(OH)2 |
| 1 photo of Leisingite associated with Pararaisaite | CuMg[Te6+O4(OH)2] · 6H2O |
Related Minerals - Strunz-mindat Grouping
| 4.FL. | Trébeurdenite | Fe2+2Fe3+4O2(OH)10CO3 · 3H2O |
| 4.FL. | Mariakrite | [Ca4Al2(OH)12(H2O)4][Fe2S4] |
| 4.FL.05 | Muskoxite | Mg7Fe4O13 · 10H2O |
| 4.FL.05 | Jamborite | Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O |
| 4.FL.05 | Mössbauerite | Fe3+6O4(OH)8[CO3] · 3H2O |
| 4.FL.05 | Meixnerite | Mg6Al2(OH)16(OH)2 · 4H2O |
| 4.FL.05 | Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O |
| 4.FL.05 | Fougèrite | Fe2+4Fe3+2(OH)12[CO3] · 3H2O |
| 4.FL.05 | Dritsite | Li2Al4(OH)12Cl2 · 3H2O |
| 4.FL.05 | Rotemite | Ca4Cr2(OH)12Cl2 · 4H2O |
| 4.FL.05 | Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O |
| 4.FL.10 | Hydrocalumite | Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O |
| 4.FL.15 | Kuzelite | Ca4Al2(OH)12[SO4] · 6H2O |
| 4.FL.20 | Jianshuiite | (Mg,Mn,Ca)Mn3O7 · 3H2O |
| 4.FL.20 | Ernienickelite | NiMn3O7 · 3H2O |
| 4.FL.20 | Aurorite | Mn2+Mn4+3O7 · 3H2O |
| 4.FL.20 | Chalcophanite | ZnMn4+3O7 · 3H2O |
| 4.FL.25 | Woodruffite | Zn2+x/2(Mn4+1-xMn3+x)O2 · yH2O |
| 4.FL.30 | Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
| 4.FL.30 va | 'Lampadite' | Cu, Mn, O, H |
| 4.FL.35 | Buserite | Na4Mn14O27 · 21H2O |
| 4.FL.40 | Takanelite | (Mn,Ca)Mn4O9 · H2O |
| 4.FL.40 | Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| 4.FL.45 | Birnessite | (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O |
| 4.FL.55 | Cianciulliite | Mn(Mg,Mn)2Zn2(OH)10 · 2-4H2O |
| 4.FL.60 | Jensenite | Cu3[TeO6] · 2H2O |
| 4.FL.70 | Magnesiohongruiite-(Fe3+) | (Mg2Fe3+)Fe3+NbO7(OH) |
| 4.FL.70 | Akdalaite | Al10O14(OH)2 |
| 4.FL.75 | Cafetite | CaTi2O5 · H2O |
| 4.FL.80 | Mourite | UMo5O12(OH)10 |
| 4.FL.85 | Deloryite | Cu4(UO2)(MoO4)2(OH)6 |
| 4.FL.90 | Lagalyite | Ca2xMn1-xO2 · 1.5-2H2O |
| 4.FL.95 | 'Tunnerite' | |
| 4.FL.100 | Carbocalumite | Ca4Al2(OH)12(CO3) · 6H2O |
| 4.FL.100 | Mampsisite | Ca4Al2(CO3)(OH)12 · 5H2O |
Fluorescence of Leisingite
non-fluorescent
Other Information
IR Spectrum:
[cm-1]: 3253 (structural water with an O-H stretching frequency), 1670 (H-O-H flexing frequency)
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Leisingite
mindat.org URL:
https://www.mindat.org/min-7151.html
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Please feel free to link to this page.
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References for Leisingite
Reference List:
Roberts, Andrew C., Groat, Lee A., Grice, Joel D., Gault, Robert A., Jensen, Martin C., Moffatt, Elizabeth A., Stirling, John A. R. (1996) Leisingite, Cu(Mg,Cu,Fe,Zn)2Te6+O6·6H2O, a new mineral species from the Centennial Eureka mine, Juab County, Utah. Mineralogical Magazine, 60 (401) 653-657 doi:10.1180/minmag.1996.060.401.11
Margison, S. M., Grice, J. D., Groat, L. A. (1997) The crystal structure of leisingite, (Cu2+,Mg,Zn)2(Mg,Fe)Te6+O6·6H2O. The Canadian Mineralogist, 35 (3) 759-763
Jambor, John L., Roberts, Andrew C. (1998) New mineral names. American Mineralogist, 83 (3-4) 400-403
Localities for Leisingite
Showing 5 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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.
Mongolia | |
| Davaasuren et al. (2016) |
USA | |
| Kampf et al. (2022) |
| Collected by and in the collection of ... |
| Collected by and in the collection of ... | |
| Roberts et al. (1996) |
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Centennial Eureka Mine, Eureka, Juab County, Utah, USA