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Leisingite

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About LeisingiteHide

Formula:
CuMg2Te6+O6 · 6H2O
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
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:
CuMg2Te6+O6 · 6H2O
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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.70 (100)
4.834 (80)
4.604 (60)
2.655 (60)
2.556 (70)
2.326 (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:
Quartz1 photo of Leisingite associated with Quartz on mindat.org.
Utahite1 photo of Leisingite associated with Utahite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.FL.TrébeurdeniteFe2+2Fe3+4O2(OH)10CO3·3H2OTrig. 3m (3 2/m) : R3m
4.FL.05WoodalliteMg6Cr2(OH)16Cl2 · 4H2OTrig.
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.20Aurorite(Mn2+,Ag,Ca)Mn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20Chalcophanite(Zn,Fe,Mn)Mn3O7 · 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.70Akdalaite5Al2O3 · H2OHex.
4.FL.75CafetiteCaTi2O5 · H2OMon. 2/m : P21/b
4.FL.80MouriteUMo5O12(OH)10Mon.
4.FL.85DeloryiteCu4(UO2)(MoO4)2(OH)6Mon.

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.

Internet Links for LeisingiteHide

Localities for LeisingiteHide

ⓘ - 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.
      • East Tintic Mts
        • Tintic District
          • Eureka
Mineralogical Magazine(1996) 60, 653-657
          • Mammoth
            • Mammoth Peak
Collected by and in the collection of Brent Thorne. Raman analyzed by Bob Housley.
Mineral and/or Locality  
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