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Vapnikite

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Formula:
Ca2CaUO6
Colour:
Yellow-brown
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
5.322 (Calculated)
Crystal System:
Monoclinic
Name:
For Yevgeny Vapnik (Ben Gurion University of the Negev, Beer Sheva, Israel), who initiated a new program of geological, geophysical, petrological and mineralogical studies of the Hatrurim Formation in Israel and Jordan.
An analogue of the synthetic ordered double-perovskite β-Ca3UO6 and is isostructural with the natural fluorperovskite: cryolite Na3AlF6.


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Classification of VapnikiteHide

Approved
Approval Year:
2013
First Published:
2014
4.00.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
0 :
0 :

Physical Properties of VapnikiteHide

Vitreous
Transparency:
Transparent
Comment:
Strong vitreous lustre
Colour:
Yellow-brown
Streak:
white with a yellow hue
Hardness:
Hardness:
VHN25=534 kg/mm2 - Vickers
Comment:
Corresponding to the hardness of ~5
Cleavage:
None Observed
Parting:
None observed
Fracture:
Irregular/Uneven
Density:
5.322 g/cm3 (Calculated)

Optical Data of VapnikiteHide

Type:
Biaxial
Pleochroism:
Non-pleochroic
Comments:
Average RI 1.78(3)

Chemical Properties of VapnikiteHide

Formula:
Ca2CaUO6

Crystallography of VapnikiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.739(1) Å, b = 5.951(1) Å, c = 8.312(1) Å
β = 90.4(1)°
Ratio:
a:b:c = 0.964 : 1 : 1.397
Unit Cell V:
283.9 ų
Z:
2
Morphology:
Xenomorphic grains
Comment:
P21/n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.838(78)
4.706(39)
4.131(79)
2.975(47)
2.938(100)
2.922(99)
2.870(43)
2.065(47)

Type Occurrence of VapnikiteHide

General Appearance of Type Material:
Small grains up to 20–30 μm in size wedged between larnite, brownmillerite and ye'elimite
Place of Conservation of Type Material:
The Museum of Natural History in Bern, Bern, Switzerland, Catalogue number NMBE 42401
Geological Setting of Type Material:
Larnite pyrometamorphic rocks of the Hatrurim Formation
Associated Minerals at Type Locality:

Synonyms of VapnikiteHide

Other Language Names for VapnikiteHide

Relationship of Vapnikite to other SpeciesHide

Other Members of this group:
LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ye'elimite1 photo of Vapnikite associated with Ye'elimite on mindat.org.
Brownmillerite1 photo of Vapnikite associated with Brownmillerite on mindat.org.
Larnite1 photo of Vapnikite associated with Larnite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.00.Goethiteα-Fe3+O(OH)Orth. mmm (2/m 2/m 2/m)
4.00.Microlite GroupIso. m3m (4/m 3 2/m) : Fd3m
4.00.Ferrotaaffeite-6N'3S(Be,Zn,Mg)FeAl4O8Trig.
4.00.Pyrochlore GroupA2Nb2(O,OH)6Z
4.00.Roméite Group
4.00.Ferrohögbomite-2N2S[(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2Hex. 6mm : P63mc
4.00.Písekite-(Y)(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4
4.00.UM2004-19-O:AlCeGdZr(Gd,Ce)4Al2Zr4O17
4.00.UM2004-21-O:CaFeGdZrCa2Gd4Fe5ZrO15
4.00.UM2004-27-O:GdTiGd2Ti4O11
4.00.Mapiquiroite(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38Trig. 3 : R3
4.00.AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig. 3 : R3

Fluorescence of VapnikiteHide

sometimes weak-yellowish fluorescence

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 VapnikiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Galuskin, E.V., Galuskina, I.O., Kusz, J., Armbruster, T., Marzec, K., Dzierżanowski, P. and Murashko, M. (2013): Vapnikite, IMA 2013-082. CNMNC Newsletter No. 18, December 2013, page 3254; Mineralogical Magazine, 77, 3249-3258.
Galuskin, E., Galuskina, I., Kusz, J., Armbruster, T., Marzec, K., Dzierżanowski, P., Murashko, M. (2014): Vapnikite Ca3UO6 - a new double perovskite mineral from pyrometamorphic larnite rocks of the Jabel Harmun, Palestine Autonomy, Israel. Mineralogical Magazine, 78, 571-581
Mitchell, R., Welch, M.D., Chakhmouradian, A.R. (2016): Nomenclature of the perovskite supergroup: A hierarchical system of classification based on crystal structure and composition. Mineralogical Magazine: 80 (in press); https://doi.org/10.1180/minmag.2016.080.156

Internet Links for VapnikiteHide

Localities for VapnikiteHide

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.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
            • Southern lava flow
              • Mayener Feld
in the collection of Christof Schäfer
Jordan
 
  • Amman
    • Hashem region
      • Lisdan-Siwaga Fault
        • Siwaga
Khoury, H.N., Sokol, E.V., Kokh, S.N., Seryotkin, Y.V., Nigmatulina, E.N., Goryainov, S.V., Belogub, E.V., Clark, I.D. (2016): Tululite, Ca14(Fe3+,Al)(Al,Zn,Fe3+,Si,P,Mn,Mg)15O36: a new Ca zincate-aluminate from combustion metamorphic marbles, central Jordan. Mineralogy and Petrology, 110, 125-140
Palestine (TL)
 
  • West Bank
    • Hatrurim Formation
Galuskin, E., Galuskina, I., Kusz, J., Armbruster, T., Marzec, K., Dzierżanowski, P., Murashko, M. (2014): Vapnikite Ca3UO6 - a new double perovskite mineral from pyrometamorphic larnite rocks of the Jabel Harmun, Palestine Autonomy, Israel. Mineralogical Magazine, 78, 571-581
Mineral and/or Locality  
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