کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8910688 | 1637922 | 2018 | 48 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Equilibrium lithium isotope fractionation in Li-bearing minerals
ترجمه فارسی عنوان
تجزیه ایزوتوپ لیتیوم تعادل در مواد معدنی لیتیوم
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
Lithium isotopes are important geochemical tracers for many geological processes. Knowledge of Li isotope fractionation factors is essential for understanding the behavior of Li isotopes. On the basis of density functional perturbation theory (DFPT), we calculate Li isotope fractionation parameters of α-eucryptite (LiAlSiO4), β-eucryptite (LiAlSiO4), lithiophilite (LiMnPO4), montebrasite (LiAlPO4OH), petalite (LiAlSi4O10), bikitaite [Li2(Al2Si4O12)·2H2O], spodumene (LiAlSi2O6), lithiophosphate (Li3PO4) and amblygonite (LiAlPO4F). The reduced partition function ratios of 7Li/6Li (103 ln β7-6) for these minerals decrease in the order petaliteâ¯>â¯lithiophosphateâ¯>â¯bikitaiteâ¯>â¯Î±-eucryptiteâ¯>â¯Î²-eucryptiteâ¯>â¯montebrasiteâ¯>â¯amblygoniteâ¯>â¯lithiophiliteâ¯>â¯spodumene, agreeing with the observations on granitic pegmatites. Li isotope fractionations in these Li-rich minerals have a notable linear correlation with the average LiO bond lengths, and are significantly influenced by Li coordination number. Furthermore, we calculate Li isotope fractionation factors of Li-bearing forsterite (Mg2SiO4) and diopside (CaMgSi2O6). It is found that forsterite is enriched in heavy Li relative to diopside, and both minerals' 103 ln β7-6 values depend on Li contents. These results allow for better understanding Li isotope fractionations in natural systems and provide a theoretical basis for Li isotope applications to understand geological processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 235, 15 August 2018, Pages 360-375
Journal: Geochimica et Cosmochimica Acta - Volume 235, 15 August 2018, Pages 360-375
نویسندگان
Shanqi Liu, Yongbing Li, Jie Liu, Yiwen Ju, Jianming Liu, Zhiming Yang, Yaolin Shi,