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Żabińskiite

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Formula:
Ca[Al0.5(Ta,Nb)0.5)](SiO4)O
Colour:
Brownish
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.897 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Honour the late Professor Witold Żabiński (1929–2007) – one of the most eminent Polish mineralogists and one of the founders of the Mineralogical Society of Poland and its President in 1980–1994.
The second Ta-bearing silicate mineral after holtite. Isostructural with triclinic modification of titanite, see triclinic titanite . Identical to titanite and other titanite group species in terms of bond topology.

Titanites associated with żabińskiite are (Al,Ta,Nb)-bearing and (Al,F)-bearing.


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Classification of ŻabińskiiteHide

Approved
Approval Year:
2015
First Published:
2017
9.AG.15

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination

Pronounciation of ŻabińskiiteHide

Pronounciation:
PlayRecorded byCountry
Łukasz KruszewskiPoland

Physical Properties of ŻabińskiiteHide

Vitreous
Transparency:
Transparent
Colour:
Brownish
Streak:
White
Hardness:
Comment:
Ca. 5
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None
Fracture:
Irregular/Uneven
Density:
3.897 g/cm3 (Calculated)
Comment:
Strong dependence on composition

Optical Data of ŻabińskiiteHide

Type:
Biaxial (-)
RI values:
n = ≥ 1.89
2V:
Measured: 96.9° (5)
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Comments:
n: means ≥ 1.89
yellowish brown

Chemical Properties of ŻabińskiiteHide

Formula:
Ca[Al0.5(Ta,Nb)0.5)](SiO4)O
IMA Formula:
Ca[Al0.5(Ta,Nb)0.5)](SiO4)O
Common Impurities:
Ti,F

Crystallography of ŻabińskiiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 7.031(2) Å, b = 8.692(2) Å, c = 6.561(2) Å
α = 89.712°, β = 113.83(1)°, γ = 90.35(1)°
Ratio:
a:b:c = 0.809 : 1 : 0.755
Unit Cell V:
366.77 ų
Z:
4
Comment:
A-1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.939(65)
3.226(100)
3.001(98)
2.609(89)
2.283(20)
2.063(29)
1.740(18)
1.704(31)
Comments:
From Type Description.

Type Occurrence of ŻabińskiiteHide

General Appearance of Type Material:
Compositionally inhomogeneous aggregates (with titanite and K-mica), ca. 120 × 70 μm in size
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum of the University of Wrocław (Faculty of Earth Science and Environmental Management, Institute of Geological Sciences, Mineralogical Museum, 50-205 Wrocław, Cybulskiego 30, Poland),
Geological Setting of Type Material:
Variscan granitic pegmatite; formed together with (Al,Ta,Nb)-bearing titanites, from Ca-contaminated fluxed melts or early hydrothermal fluids, during increasing a(Ti) & a(Nb) but decreasing a(Ta), almost paralelly to polycrase-(Y) and euxenite-(Y)
Associated Minerals at Type Locality:

Synonyms of ŻabińskiiteHide

Relationship of Żabińskiite to other SpeciesHide

Member of:
Other Members of this group:
MalayaiteCaSn(SiO4)OMon.
Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
TitaniteCaTi(SiO4)OMon. 2/m : P21/b
VanadomalayaiteCaV4+(SiO4)OMon.

Related Minerals - Nickel-Strunz GroupingHide

9.AG.EdgrewiteCa9(SiO4)4F2 Mon. 2/m : P21/b
9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.15MalayaiteCaSn(SiO4)OMon.
9.AG.15TitaniteCaTi(SiO4)OMon. 2/m : P21/b
9.AG.15VanadomalayaiteCaV4+(SiO4)OMon.
9.AG.15Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
9.AG.20Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Cerite-(La)(La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Aluminocerite-(Ce)(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon.
9.AG.25Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.30SitinakiteKNa2Ti4(SiO4)2O5(OH) · 4H2OTet.
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40aNatisiteNa2Ti(SiO4)OTet.
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth.
9.AG.45Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)
9.AG.45Törnebohmite-(La)(La,Ce)2Al(SiO4)2(OH)
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth.
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2
9.AG.75AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric.
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

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 ŻabińskiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pieczka, A., Hawthorne, F.C., Ma, C., Rossman, G.R., Buffat, P., Rutkowski, B., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K. and Ilnicki, S.S. (2015) Żabińskiite,IMA 2015-033. CNMNC Newsletter No. 26, August 2015, page 945; Mineralogical Magazine: 79: 941-947.
Pieczka, A., Hawthorne, F.C., Ma, C., Rossman, G.R., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S.S., Buffat, P., Rutkowski, B. (2017): Żabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland. Mineralogical Magazine: 81: 591–610.

Internet Links for ŻabińskiiteHide

Localities for ŻabińskiiteHide

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.
Poland (TL)
 
  • Lower Silesia (Dolnośląskie)
    • Dzierżoniów District
      • Piława Górna (Ober Peilau; Gnadenfrei)
        • DSS Piława Górna Quarry
Pieczka, A., Hawthorne, F.C., Ma, C., Rossman, G.R., Szełęg, E., Szuszkiewicz, A., Turniak, K., Nejbert, K., Ilnicki, S.S., Buffat, P., Rutkowski, B. (2017): Żabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland. Mineralogical Magazine: 81: 591–610.
Mineral and/or Locality  
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