Szczegóły publikacji
Opis bibliograficzny
Crystal structure of kristiansenite from Szklarska Poręba, Southwestern Poland / R. James Evans, Bożena GOŁĘBIOWSKA, Lee A. Groat, Adam PIECZKA // Minerals [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2075-163X. — 2018 — vol. 8 iss. 12 art. no. 584, s. 1–12. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 11–12, Abstr.
Autorzy (4)
- Evans R. James
- AGHGołębiowska Bożena
- Groat Lee A.
- AGHPieczka Adam
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 119038 |
|---|---|
| Data dodania do BaDAP | 2019-01-10 |
| Tekst źródłowy | URL |
| DOI | 10.3390/min8120584 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Minerals |
Abstract
Kristiansenite, ideally Ca2ScSn(Si2O7)(Si2O6OH), a rare late-stage hydrothermal Sc-bearing sorosilicate mineral, was found in a gadolinite-fergusonite-type pegmatite of the MI-REE subclass related to the Karkonosze granite, exposed in a quarry at Szklarska Porcba, Lower Silesia, Poland. Kristiansenite occurs in an association with andradite, epidote, allanite-(Ce), titanite, fersmite, scheelite, Sc-bearing columbite-(Fe), a YNbO4 mineral as fergusonite-(Y) or fergusonite-(Y)-beta, silesiaite and wolframite. Single-crystal study of the mineral (R-1 of 4.96%), with composition Ca-2.00(Sn0.97Sc0.69Fe0.173+Mn0.05Ti0.04Zr0.03Nb0.02Al0.02Ta0.01)(Sigma 2)(Si2O7)[(Si1.98Al0.02)(Sigma 2)O-6.03(OH)(0.97)], corroborates its triclinic structure with space group-symmetry C1, Z = 2, and unit-cell parameters a = 10.0304(5), b = 8.4056(4), c = 13.3228(6) angstrom, alpha = 90.001(3), beta = 109.105(3), gamma = 89.997(3)degrees and V = 1061.40(9) angstrom(3). In the structure of the mineral, the Ca and Si sites are dominantly occupied with Ca and Si, whereas the M1-M4sites are disordered. The M3 and M4 sites are occupied dominantly by Sn and subordinately Sc, whereas the M1 and M2 sites are occupied dominantly by Sc and subordinately by remaining occupants, including Sn.
