玻璃是早期地球上浓缩磷酸盐的来源

IF 0.9 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS
Nils G Holm
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引用次数: 16

摘要

地质物质中磷的分析程序通常旨在测定以正磷酸盐po43表示的磷的总量这可能是由于分析上的困难,也可能是由于人们普遍认为,地质环境中磷的化学性质几乎完全局限于磷灰石矿物。由于磷灰石的溶解度很低,因此,人们普遍认为,在生命前的化学过程中,磷含量很少,生物前的过程基本上没有这种不可或缺的元素,除非它是由其他来源或机制提供的(如闪电还原和激活,或由天体运送到地球)。虽然我们知道在陨石材料中存在活性磷化合物,但很少考虑到地球上地质物质中可能存在活性磷化合物,如矿物晶贝石-磷化铁。岩石中Al2O3的含量似乎对磷的形态及其与硅酸盐的结合强度很重要。一般来说,低氧化铝似乎促进了孤立电荷平衡磷配合物的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Glasses as sources of condensed phosphates on the early earth

Procedures for the analysis of phosphorus in geological material normally aims for the determination of the total amount of P expressed as orthophosphate PO 4 3 - or the differentiation between inorganic and organic P. This is probably due to analytical difficulties but also to the prevalent opinion that the chemistry of phosphorus in geological environments is almost entirely restricted to the mineral apatite. Because of the low solubility of apatite it is, therefore, commonly argued that little P was around for prebiotic chemistry and that pre-biological processes would essentially have had to do without this indispensable element unless it was provided by alternative sources or mechanisms (such as reduction and activation by lightning or delivery to Earth by celestial bodies). It is a paradox that the potential existence of reactive phosphorus compounds, such as the mineral schreibersite - iron phosphide, in geological material on Earth is seldom considered although we are aware of the existence of such compounds in meteorite material. The content of Al2O3 in rocks appears to be important for the speciation of phosphorus and for how strongly it binds to silicates. In general, low alumina seems to promote the existence of isolated charge-balanced phosphorus complexes.

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来源期刊
Geochemical Transactions
Geochemical Transactions 地学-地球化学与地球物理
CiteScore
3.70
自引率
4.30%
发文量
2
审稿时长
>12 weeks
期刊介绍: Geochemical Transactions publishes high-quality research in all areas of chemistry as it relates to materials and processes occurring in terrestrial and extraterrestrial systems.
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