- Tytuł:
- Rietveld crystal structure refinement of the natural rhombohedral grossular-andradite garnet from Serbia
- Autorzy:
-
Tančić, Pavle
Kremenović, Aleksandar - Powiązania:
- https://bibliotekanauki.pl/articles/2104774.pdf
- Data publikacji:
- 2022
- Wydawca:
- Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
- Tematy:
-
ferric grossular garnet
XRPD
Rietveld method
crystal structure
R‾3c space group
order-disorder - Opis:
- Four macroscopically visible B–E (rim) zones of the natural grossular-andradite garnet with Grs58-64subAdr36-42>Sps2composition were crystallographically studied. The applied procedure includes the Rietveld refinements of the crystal structures in a series of six space groups, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. It was established that it crystallized in the rhombohedral R-3c space group. Various polyhedral distortions and structural order-disorder variations between the studied zones were also observed, determined and discussed. Therefore, rhombohedral symmetry of the studied grandite could be treated as primary and residual strain as the second cause for its slight optical anisotropy.
- Źródło:
-
Geological Quarterly; 2022, 66, 1; art. no. 7
1641-7291 - Pojawia się w:
- Geological Quarterly
- Dostawca treści:
- Biblioteka Nauki
Artykuł