S. Milani, Deborah Spartà, P. Fumagalli, Boby Joseph, R. Borghes, V. Chenda, J. Maurice, G. Bais, M. Merlini
{"title":"High-pressure and high-temperature structure and equation of state of Na<sub>3</sub>Ca<sub>2</sub>La(CO<sub>3</sub>)<sub>5</sub> burbankite","authors":"S. Milani, Deborah Spartà, P. Fumagalli, Boby Joseph, R. Borghes, V. Chenda, J. Maurice, G. Bais, M. Merlini","doi":"10.5194/ejm-34-351-2022","DOIUrl":null,"url":null,"abstract":"Abstract. In this study we report the synthesis of single crystals of\nburbankite, Na3Ca2La(CO3)5, at 5 GPa and 1073 K.\nThe structural evolution, bulk modulus and thermal expansion of burbankite were\nstudied and determined by two separate high-pressure (0–7.07(5) GPa) and\nhigh-temperature (298–746 K) in situ single-crystal X-ray diffraction\nexperiments. The refined parameters of a second-order Birch–Murnaghan\nequation of state (EoS) are V0= 593.22(3) Å3 and KT0= 69.8(4) GPa. The thermal expansion coefficients of a Berman-type EoS are\nα0= 6.0(2) ×10-5 K−1, α1= 5.7(7) ×10-8 K−2 and V0= 591.95(8) Å3. The thermoelastic\nparameters determined in this study allow us to estimate the larger density\nof burbankite in the pressure-temperature range of 5.5–6 GPa and\n1173–1273 K, with respect to the density of carbonatitic magmas at the same\nconditions. For this reason, we suggest that burbankite might fractionate\nfrom the magma and play a key role as an upper-mantle reservoir of light\ntrivalent rare earth elements (REE3+).\n","PeriodicalId":11971,"journal":{"name":"European Journal of Mineralogy","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Mineralogy","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.5194/ejm-34-351-2022","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MINERALOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Abstract. In this study we report the synthesis of single crystals of
burbankite, Na3Ca2La(CO3)5, at 5 GPa and 1073 K.
The structural evolution, bulk modulus and thermal expansion of burbankite were
studied and determined by two separate high-pressure (0–7.07(5) GPa) and
high-temperature (298–746 K) in situ single-crystal X-ray diffraction
experiments. The refined parameters of a second-order Birch–Murnaghan
equation of state (EoS) are V0= 593.22(3) Å3 and KT0= 69.8(4) GPa. The thermal expansion coefficients of a Berman-type EoS are
α0= 6.0(2) ×10-5 K−1, α1= 5.7(7) ×10-8 K−2 and V0= 591.95(8) Å3. The thermoelastic
parameters determined in this study allow us to estimate the larger density
of burbankite in the pressure-temperature range of 5.5–6 GPa and
1173–1273 K, with respect to the density of carbonatitic magmas at the same
conditions. For this reason, we suggest that burbankite might fractionate
from the magma and play a key role as an upper-mantle reservoir of light
trivalent rare earth elements (REE3+).
期刊介绍：
EJM was founded to reach a large audience on an international scale and also for achieving closer cooperation of European countries in the publication of scientific results. The founding societies have set themselves the task of publishing a journal of the highest standard open to all scientists performing mineralogical research in the widest sense of the term, all over the world. Contributions will therefore be published primarily in English.
EJM publishes original papers, review articles and letters dealing with the mineralogical sciences s.l., primarily mineralogy, petrology, geochemistry, crystallography and ore deposits, but also biomineralogy, environmental, applied and technical mineralogy. Nevertheless, papers in any related field, including cultural heritage, will be considered.
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