英语翻译The dissolution of α-FePO4 andthe α-Ga0.75Fe0.25PO4 solid solution withα-quartz-type structures under hydrothermal conditions in 1 M HNO3 aqueous solution wasinvestigated by in situ X-ray absorption spectroscopy (XAS) at the FeK-edge.T

英语翻译The dissolution of α-FePO4 andthe α-Ga0.75Fe0.25PO4 solid solution withα-quartz-type structures under hydrothermal conditions in 1 M HNO3 aqueous solution wasinvestigated by in situ X-ray absorption spectroscopy (XAS) at the FeK-edge.T
英语翻译
The dissolution of α-FePO4 and
the α-Ga0.75Fe0.25PO4 solid solution with
α-quartz-type structures under hydrothermal conditions in 1 M HNO3 aqueous solution was
investigated by in situ X-ray absorption spectroscopy (XAS) at the Fe
K-edge.The solubility of α-FePO4 increases with temperature and is
higher at 25 MPa than at 50 MPa.The Fe3+ cation in solution is
6-fold coordinated with an average Fe–O distance close to 2.0 Å.A similar
experiment was performed with a solid solution of α-quartz-type Ga0.75Fe0.25PO4
as the starting phase under a pressure of 25 MPa.By varying the temperature
from 303 K up to 573 K a single crystal was grown with 23% Fe3+ with
the α-quartz-type structure.These results show that the crystallization of
pure α-quartz-type FePO4 by the hydrothermal method is not possible
due to the formation of very stable Fe3+ hexa-aquo complexes [Fe(H2O)6]3+
and to the absence of FeO4 tetrahedra in solution.Ga3+
cations in solution induce the formation of gallophosphate complexes at the
solid–liquid interface,which are at the origin of the nuclei for
crystallization.We propose a crystallization mechanism in which the Fe3+
substitutes Ga3+ with a 4-fold coordination in mixed (iron/gallo)-phosphate
complexes that leads to the growth of an α-quartz-type Ga0.77Fe0.23PO4
single crystal.

英语翻译The dissolution of α-FePO4 andthe α-Ga0.75Fe0.25PO4 solid solution withα-quartz-type structures under hydrothermal conditions in 1 M HNO3 aqueous solution wasinvestigated by in situ X-ray absorption spectroscopy (XAS) at the FeK-edge.T
α-磷酸铁和α-Ga0.75Fe0.25PO4固溶体以及α-石英型结构在1摩尔硝酸水溶液中的溶解情况在高温的条件下于反应过程中经由X-射线吸收光谱（XAS）在 Fe K-边缘 分析.α-磷酸铁的可溶性随着温度的提高而提高,压强25兆帕时高于压强50兆帕.Fe3+ 阳离子的协调性增加了6倍,Fe–O 之间的距离接近 2.0 埃. 类似的实验曾经在压强为25兆帕的状况下做过,其中作为启动阶段的固溶体是Ga0.75Fe0.25PO4 和 α-石英型结构.当 把温度从303 K 上升到573 K 时,23% Fe3+ 和 α-石英型结构析出了一颗单晶.以上的实验结果显示,由于有非常稳定的水和复合物[Fe(H2O)6]3+的形成以及缺少FeO4四面体,用高温处理的办法从而形成纯α-石英型结构FePO4是不可行的.溶液里的Ga3+阳离子的存在促使镓磷酸盐复合物在固体和液体界面形成,这是形成结晶的原因.我们建议
用Fe3+离子代替Ga3+,并且在（铁/加洛）磷酸酯复合物里用4倍的协调性,这样,就会产生一颗α-石英型Ga0.77Fe0.23PO4的单晶.
累死我了.6-fold coordination 和 4-fold coordiation 不知道是什么东西,实在帮不了你了.