Приказ основних података о документу
Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia)
dc.creator | Tančić, Pavle | |
dc.creator | Dimitrijević, Radovan | |
dc.creator | Poznanović, Maja | |
dc.creator | Pačevski, Aleksandar | |
dc.creator | Sudar, Slobodanka | |
dc.date.accessioned | 2023-03-05T14:59:12Z | |
dc.date.available | 2023-03-05T14:59:12Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 1000-9515 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/5900 | |
dc.description.abstract | The crystal structure of ludwigite from Vranovac ore deposit (Boranja Mt., Serbia) was refined using the X-ray powder diffraction (XRPD) Rietveld method in the space group Pbam to a final RB=7.45% and RF=5.26%. It has the unit cell dimensions of: a=9.2515(2) Å; b=12.3109(2) Å; c=3.03712(7) Å; and V=345.91(1) Å3. The calculated distances and angles are mostly in good agreement with the Mg2+-Fe2+ substitutions across the M(1) and M(3) sites, as well as with the Fe3+-Al3+ replacement in the M(4) site. However, the mean observed M(2)-O distance is considerably shorter than prescribed, due to a slight increase of the Fe3+ content in the M(2) site. Such replacement was compensated by slight increase of the Fe2+ content in the M(4) site, resulting in the (Mg1.48Fe2+0.46Fe3+0.05Mn0.02)2.01(Fe3+0.94Fe2+0.04Al0.02)1.00B1.00O5 composition. The formation temperature was estimated to be about 500–600°C. The influences of the various chemical compositions to the crystallographic parameters, M-O distances, M(3) and M(4) sites shift, distortion parameters and estimated valences, were also studied and compared with other reference samples. | sr |
dc.language.iso | en | sr |
dc.publisher | John Wiley & Sons, Inc. | sr |
dc.rights | restrictedAccess | sr |
dc.source | Acta Geologica Sinica-English Edition | sr |
dc.subject | ludwigite | sr |
dc.subject | crystal structure | sr |
dc.subject | chemical composition | sr |
dc.subject | M-O distances | sr |
dc.subject | distortion parameters | sr |
dc.subject | ions valences | sr |
dc.subject | comparison | sr |
dc.subject | formation temperature | sr |
dc.title | Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia) | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.volume | 86 | |
dc.citation.issue | 6 | |
dc.citation.spage | 1524 | |
dc.citation.epage | 1538 | |
dc.citation.rank | M22 | |
dc.identifier.doi | 10.1111/1755-6724.12020 | |
dc.identifier.scopus | 2-s2.0-84873694996 | |
dc.identifier.wos | 000313494000021 | |
dc.type.version | publishedVersion | sr |