| Reference Type | Journal (article/letter/editorial) |
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| Title | 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 |
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| Journal | Mineralogical Magazine |
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| Authors | Pieczka, Adam | Author |
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| Hawthorne, Frank C. | Author |
| Ma, Chi | Author |
| Rossman, George R. | Author |
| Szełęg, Eligiusz | Author |
| Szuszkiewicz, Adam | Author |
| Turniak, Krzysztof | Author |
| Nejbert, Krzysztof | Author |
| Ilnicki, Sławomir | Author |
| Buffat, Philippe | Author |
| Rutkowski, Bogdan | Author |
| Year | 2017 (June) | Volume | 81 |
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| Issue | 3 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/rruff_1.0/uploads/MM81_591.pdf+ |
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| DOI | doi:10.1180/minmag.2016.080.110Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 244894 | Long-form Identifier | mindat:1:5:244894:1 |
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| GUID | 0 |
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| Full Reference | Pieczka, Adam, Hawthorne, Frank C., Ma, Chi, Rossman, George R., Szełęg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, Sławomir, Buffat, Philippe, Rutkowski, Bogdan (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 (3) 591-610 doi:10.1180/minmag.2016.080.110 |
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| Plain Text | Pieczka, Adam, Hawthorne, Frank C., Ma, Chi, Rossman, George R., Szełęg, Eligiusz, Szuszkiewicz, Adam, Turniak, Krzysztof, Nejbert, Krzysztof, Ilnicki, Sławomir, Buffat, Philippe, Rutkowski, Bogdan (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 (3) 591-610 doi:10.1180/minmag.2016.080.110 |
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| Abstract/Notes | Żabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, was found in a Variscan granitic pegmatite at Piława Górna, Lower Silesia, SW Poland. The mineral occurs along with (Al,Ta,Nb)- and (Al,F)-bearing titanites, a pyrochlore-supergroupmineral and a K-mica in compositionally inhomogeneous aggregates, ∼120 μm × 70 μm in size, in a fractured crystal of zircon intergrown with polycrase-(Y) and euxenite-(Y). Żabińskiite is transparent, brittle, brownish, with a white streak, vitreous lustre and a Mohs hardness of ∼5. The calculated density for the refined crystal is equal to 3.897 g cm–3, but depends strongly on composition. The mineral is non-pleochroic, biaxial (–), with mean refractive indices ≥1.89. The (Al,Ta,Nb)-richest żabińskiite crystal,(Ca0.980Na0.015)∑=0.995(Al0.340Fe3+0.029Ti0.298V0.001Zr0.001Sn0.005Ta0.251Nb0.081)∑=1.005[(Si0.988Al0.012)O4.946F0.047(OH)0.007)∑=5.000];60.7 mol.% Ca[Al0.5(Ta,Nb)0.5](SiO4)O; is close in composition to previously described synthetic material. Żabińskiite is triclinic (space group symmetry A1) and has unit-cell parameters a = 7.031(2) Å, b = 8.692(2) Å,c = 6.561(2) Å, α = 89.712(11)°, β = 113.830(13)°, γ = 90.352(12)° and V = 366.77 (11) Å3. It is isostructural with triclinic titanite and bond-topologically identical with titanite and other minerals of the titanite group.Żabińskiite crystallized along with (Al,Ta,Nb)-bearing titanites at increasing Ti and Nb, and decreasing Ta activities, almost coevally with polycrase-(Y) and euxenite-(Y) from Ca-contaminated fluxed melts or early hydrothermal fluids. |
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