Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by comparative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R-3c space group. Various polyhedral distortions and structural order-disorder variations between the zones studied are also described and discussed. The rhombohedral symmetry of the ferric grossular garnet analysed can be regarded as primary, residual strain being a secondary cause for its slight optical anisotropy.
Keywords:
ferric grossular garnet / XRPD / Rietveld method / crystal structure / R-3c space group / order-disorder
Source:
Geological Quarterly, 2022, 66, 1, 7-
Publisher:
Polish Geological Institute - National Research Institute
TY - JOUR
AU - Tančić, Pavle
AU - Kremenović, Aleksandar
PY - 2022
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5883
AB - Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by comparative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R-3c space group. Various polyhedral distortions and structural order-disorder variations between the zones studied are also described and discussed. The rhombohedral symmetry of the ferric grossular garnet analysed can be regarded as primary, residual strain being a secondary cause for its slight optical anisotropy.
PB - Polish Geological Institute - National Research Institute
T2 - Geological Quarterly
T1 - Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia
VL - 66
IS - 1
SP - 7
DO - 10.7306/gq.1639
ER -
@article{
author = "Tančić, Pavle and Kremenović, Aleksandar",
year = "2022",
abstract = "Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by comparative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R-3c space group. Various polyhedral distortions and structural order-disorder variations between the zones studied are also described and discussed. The rhombohedral symmetry of the ferric grossular garnet analysed can be regarded as primary, residual strain being a secondary cause for its slight optical anisotropy.",
publisher = "Polish Geological Institute - National Research Institute",
journal = "Geological Quarterly",
title = "Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia",
volume = "66",
number = "1",
pages = "7",
doi = "10.7306/gq.1639"
}
Tančić, P.,& Kremenović, A.. (2022). Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia. in Geological Quarterly
Polish Geological Institute - National Research Institute., 66(1), 7.
https://doi.org/10.7306/gq.1639
Tančić P, Kremenović A. Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia. in Geological Quarterly. 2022;66(1):7.
doi:10.7306/gq.1639 .
Tančić, Pavle, Kremenović, Aleksandar, "Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia" in Geological Quarterly, 66, no. 1 (2022):7,
https://doi.org/10.7306/gq.1639 . .
