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Leisingite

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About LeisingiteHide

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.
Chemically very similar to raisaite.


Classification of LeisingiteHide

Approved
First Published:
1996
Approval History:
redefinition confirmed within the IMA Newsletter no. 52
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

Physical Properties of LeisingiteHide

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}
Fracture:
Irregular/Uneven
Comment:
somewhat flexible
Density:
3.41 g/cm3 (Calculated)

Optical Data of LeisingiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.803 nε = 1.581
Max Birefringence:
δ = 0.222
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of LeisingiteHide

Formula:
Cu2MgTe6+O6 · 6H2O

the "Mindat formula" is correct, as supported by the 2019 IMA redefinition
Emperical Formula (of original material):
Cu1.00(Mg0.77Cu0.56Fe0.48Zn0.03)Σ1.84Te1.066+O6.02·5.98H2O
Common Impurities:
Fe

Crystallography of LeisingiteHide

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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005525LeisingiteMargison 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 35 759-76319970293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.70 Å(100)
4.834 Å(80)
4.604 Å(60)
2.655 Å(60)
2.556 Å(70)
2.326 Å(70)

Type Occurrence of LeisingiteHide

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 LeisingiteHide

Other Language Names for LeisingiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Leisingite associated with QuartzSiO2
1 photo of Leisingite associated with UtahiteMgCu4Zn2Te6+3O14(OH)4 · 6H2O

Related Minerals - Nickel-Strunz GroupingHide

4.FL.TrébeurdeniteFe2+2Fe3+4O2(OH)10CO3 · 3H2OTrig. 3m (3 2/m) : R3m
4.FL.05WoodalliteMg6Cr2(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05IowaiteMg6Fe3+2(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05JamboriteNi2+1-xCo3+x(OH)2-x(SO4)x · nH2OTrig. 3m (3 2/m) : R3m
4.FL.05MeixneriteMg6Al2(OH)16(OH)2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05MuskoxiteMg7Fe4O13 · 10H2OTrig. 3m (3 2/m)
4.FL.05FougèriteFe2+4Fe3+2(OH)12[CO3] · 3H2OTrig. 3m (3 2/m) : R3m
4.FL.10HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2OMon. 2 : P21
4.FL.15KuzeliteCa4Al2(OH)12[SO4] · 6H2OTrig.
4.FL.20AuroriteMn2+Mn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20ChalcophaniteZnMn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20ErnienickeliteNiMn3O7 · 3H2OTrig. 3 : R3
4.FL.20Jianshuiite(Mg,Mn,Ca)Mn3O7 · 3H2OTrig. 3 : R3
4.FL.25WoodruffiteZn2+x/2(Mn4+1-xMn3+x)O2 · yH2OMon. 2/m : B2/m
4.FL.30Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2OHex.
4.FL.35BuseriteNa4Mn14O27 · 21H2O
4.FL.40Ranciéite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2OTrig. 3 : P3
4.FL.40Takanelite(Mn,Ca)Mn4O9 · H2OHex.
4.FL.45Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2OMon. 2/m : B2/m
4.FL.55CianciulliiteMn(Mg,Mn)2Zn2(OH)10 · 2-4H2OMon. 2/m : B2/m
4.FL.60JenseniteCu3[TeO6] · 2H2OMon. 2/m : P21/m
4.FL.70AkdalaiteAl10O14(OH)2Hex.
4.FL.75CafetiteCaTi2O5 · H2OMon. 2/m : P21/b
4.FL.80MouriteUMo5O12(OH)10Mon.
4.FL.85DeloryiteCu4(UO2)(MoO4)2(OH)6Mon. 2/m : B2/m

Fluorescence of LeisingiteHide

non-fluorescent

Other InformationHide

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.

References for LeisingiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A.C., Groat, L.A., Grice, J.D., Gault, R.A., Jensen, M.C., Moffatt, E.A., and Stirling, J.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: 653-657.
Jambor, J.L., Roberts, A.C. (1997) New mineral names. American Mineralogist: 82: 207-210.
Mandarino, J.A. (1997) Abstracts of New Mineral Descriptions. Mineralogical Record: 28: 222.
Margison, S.M., Grice, J.D., and Groat, L.A. (1997) The crystal structure of leisingite, (Cu2+,Mg,Zn)2(Mg,Fe)Te6+O6·6H2O. The Canadian Mineralogist: 35: 759-763.
Jambor, J.L., Roberts, A.C. (1998) New mineral names. American Mineralogist: 83: 400-403.
Miyawaki, R., Hatert, F., Pasero, M., Mills, S.J. (2019): New minerals approved by IMA CNMNC in Octber and November 2019. Newsletter 52. IMA 19-E: Revalidation of dienerite; http://forum.amiminerals.it/viewtopic.php?f=5&t=15946

Internet Links for LeisingiteHide

Localities for LeisingiteHide

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.
USA (TL)
 
  • Utah
    • Juab Co.
      • Tintic Mining District
        • Eureka
Mineralogical Magazine(1996) 60, 653-657
        • Mammoth
Collected by and in the collection of Brent Thorne. Raman analyzed by Bob Housley. EDS analyzed by KayGeeDee minerals.
Collected by and in the collection of Alex Earl and Brent Thorne.
 
Mineral and/or Locality  
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