Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia)
Само за регистроване кориснике
2012
Чланак у часопису (Објављена верзија)
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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 dist...ances, M(3) and M(4) sites shift, distortion parameters and estimated valences, were also studied and compared with other reference samples.
Кључне речи:
ludwigite / crystal structure / chemical composition / M-O distances / distortion parameters / ions valences / comparison / formation temperatureИзвор:
Acta Geologica Sinica-English Edition, 2012, 86, 6, 1524-1538Издавач:
- John Wiley & Sons, Inc.
DOI: 10.1111/1755-6724.12020
ISSN: 1000-9515
WoS: 000313494000021
Scopus: 2-s2.0-84873694996
Институција/група
IHTMTY - JOUR AU - Tančić, Pavle AU - Dimitrijević, Radovan AU - Poznanović, Maja AU - Pačevski, Aleksandar AU - Sudar, Slobodanka PY - 2012 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5900 AB - 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. PB - John Wiley & Sons, Inc. T2 - Acta Geologica Sinica-English Edition T1 - Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia) VL - 86 IS - 6 SP - 1524 EP - 1538 DO - 10.1111/1755-6724.12020 ER -
@article{ author = "Tančić, Pavle and Dimitrijević, Radovan and Poznanović, Maja and Pačevski, Aleksandar and Sudar, Slobodanka", year = "2012", 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.", publisher = "John Wiley & Sons, Inc.", journal = "Acta Geologica Sinica-English Edition", title = "Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia)", volume = "86", number = "6", pages = "1524-1538", doi = "10.1111/1755-6724.12020" }
Tančić, P., Dimitrijević, R., Poznanović, M., Pačevski, A.,& Sudar, S.. (2012). Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia). in Acta Geologica Sinica-English Edition John Wiley & Sons, Inc.., 86(6), 1524-1538. https://doi.org/10.1111/1755-6724.12020
Tančić P, Dimitrijević R, Poznanović M, Pačevski A, Sudar S. Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia). in Acta Geologica Sinica-English Edition. 2012;86(6):1524-1538. doi:10.1111/1755-6724.12020 .
Tančić, Pavle, Dimitrijević, Radovan, Poznanović, Maja, Pačevski, Aleksandar, Sudar, Slobodanka, "Crystal structure and chemical composition of ludwigite from Vranovac ore deposit (Boranja Mountain, Serbia)" in Acta Geologica Sinica-English Edition, 86, no. 6 (2012):1524-1538, https://doi.org/10.1111/1755-6724.12020 . .