The Siena meteorite: Mineralogy and Chemistry

Baldanza, B.; Levi-Donati, G. R.; Wiik, H. B.

doi:10.1180/minmag.1969.037.285.04

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…In spite of their small number, the study of Italian meteorites has long been the subject of intense historiographic and theoretical debates (Veggiani 1964; Tinazzi 1994; Barbieri and Zuccoli 1997; Guidone 1997; Cevolani 2005). For instance, the shower of stones that fell at Siena on June 16, 1764 provoked a lively controversy involving over a half dozen of scientists (Baldanza et al 1969; Levi Donati 1994; Marvin 1998).…”

Section: Discussionmentioning

confidence: 99%

Julius Obsequens’s book, Liber Prodigiorum: A Roman era record of meteorite falls, fireballs, and other celestial phenomena

Franza

Pratesi

2020

Meteorit & Planetary Scien

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Julius Obsequens was the pseudonym of a Roman historian presumably living in the 4th century ad, whose life is shrouded in mystery. All that is known about Obsequens’s biography is that he was the author of a book entitled Liber Prodigiorum (Book of Prodigies), a collection of prodigies deduced from Livy’s Ab Urbe Condita Libri (Books from the Founding of the City). The Liber Prodigiorum covered the period from 190 to 11 bc and gathered a chronological list of portents of various kinds (e.g., births of monstrous animals or men, statues that shed blood, voices from beyond the grave, epidemics, earthquakes, unidentified flying objects). Among these extraordinary reports, chronicles of celestial phenomena were also included. The interdisciplinary approach adopted in this research has clarified the nature of the events described in the text and has enabled the identification of new Italian meteorite falls that are not included in the Meteoritical Bulletin Database.

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Section: Discussionmentioning

confidence: 99%

Julius Obsequens’s book, Liber Prodigiorum: A Roman era record of meteorite falls, fireballs, and other celestial phenomena

Franza

Pratesi

2020

Meteorit & Planetary Scien

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“…We analyzed data for Si, Mg, Ca, Fe, Ni, and Co in chondrite samples (bulk chemistry) obtained as a result of previous research (using the ICP-MS technique, and the ICP-ES or XRF techniques for Ni) as well as meta-data from literature (Baldanza et al, 1969;Das Gupta et al, 1979;Fulton & Rhodes, 1984;Graham et al, 1976;Haramura et al, 1983;Jarosewich, 1990;Koblitz, 2010;Łuszczek & Przylibski, , 2021Przylibski et al, 2019Przylibski et al, , 2020Yanai et al, 1995). We assume that reliable and comparable data have been obtained since 1969 due to the development of reliable and modern analytical methods.…”

Section: Methodsmentioning

confidence: 99%

Results of statistical analysis of primary components concentrations in bulk chemical composition of ordinary chondrite groups

Przylibski

Długosz‐Lisiecka

Łuszczek

et al. 2023

Meteorit & Planetary Scien

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We used two different methods of statistical analysis—cluster analysis and principal component analysis—to analyze the concentrations of principal chemical components (Si, Mg, Ca, Fe, Ni) and Co in ordinary chondrites. The analysis is based predominantly on published data (metadata). In total, chemical composition data from 646 ordinary chondrites were used in the statistical analysis. The aim of this analysis was to establish whether it would be possible or not to distinguish H, L, and LL chondrites based on the concentrations of major elements and Co in their bulk chemical compositions. It was also important to determine what conclusions such an analysis could enable to draw about matter differentiation in the formation environments of primordial parent bodies of particular ordinary chondrite groups (H, L, and LL). Another aim of the statistical analysis was to determine whether the distribution of Fe and Ni (with Co admixtures) is independent of petrographic types within particular groups of chondrites. This is of crucial importance for determining the distribution of FeNi(Co) ore occurrences in potential extraterrestrial deposits on modern asteroids—the sources of ordinary chondrites. The obtained results of statistical analyses confirmed that a clear‐cut distinction between particular groups of ordinary chondrites is only possible for group H, while distinguishing L chondrites from LL chondrites is not always obvious. The results of the statistical analyses relating to the question of the possible existence of several primordial parent bodies (formation environments) of each group of ordinary chondrites are consistent with the results of contemporary astronomical spectroscopy research. What is particularly interesting is obtaining indications of the existence of common formation environments of the matter of L and LL chondrites, possibly on a few primordial parent bodies. The statistical analyses indicate that there is no correlation between the concentration of principal chemical components and the petrographic type of ordinary chondrites. This proves homogenous distributions of these elements within the parent bodies of each group of ordinary chondrites. Hence, the distribution of these elements in individual present‐day asteroids is also homogenous.

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Thermal Decomposition of Şaphane Alunite Ore

Küçük

Gülaboğlu

2002

Ind. Eng. Chem. Res.

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The thermal decomposition of S ¸aphane alunite from Ku ¨tahya, Turkey, has been studied using ambient-and high-temperature X-ray diffraction analysis, differential thermal analysis, and thermogravimetric analysis. The alunite content in the ore was about 47.5%. The first endothermic peak at about 545 °C is due to the dehydration of the structural water and the transformation of alunite into KAl(SO 4 ) 2 and amorphous Al 2 O 3 . The small exothermic peak at about 712 °C is probably caused by the recrystallization of KAl(SO 4 ) 2 into K 3 Al(SO 4 ) 3 and Al 2 -(SO 4 ) 3 . So far, no work has reported this new phase, K 3 Al(SO 4 ) 3 , resulting from the exothermic reaction of alunite. Moreover, the d and I values of unidentified peaks in the previous literature gave reflections that were surprisingly identical to those of the K 3 Al(SO 4 ) 3 peaks. The second endothermic peak at about 810 °C is due to the desulfurization by which K 3 Al(SO 4 ) 3 and amorphous Al 2 (SO 4 ) 3 decompose into K 2 SO 4 (arcanite) and two polymorphic varieties of Al 2 O 3 (κ and γ). Above 800 °C, only γ-alumina and arcanite were observed.

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The Siena meteorite: Mineralogy and Chemistry

Cited by 7 publications

References 16 publications

Julius Obsequens’s book, Liber Prodigiorum: A Roman era record of meteorite falls, fireballs, and other celestial phenomena

Julius Obsequens’s book, Liber Prodigiorum: A Roman era record of meteorite falls, fireballs, and other celestial phenomena

Results of statistical analysis of primary components concentrations in bulk chemical composition of ordinary chondrite groups

Thermal Decomposition of Şaphane Alunite Ore

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