Investigations of the meteoritic mineral (Fe,Ni)3P
Investigations of the meteoritic mineral (Fe,Ni)3P
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陨石矿物 (Fe,Ni)3P 的研究
DOI：
10.1002/crat.200410307
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发表时间：
2005
影响因子：
1.5
通讯作者：
O. Moretzki
中科院分区：
文献类型：
--
作者：
V. Geist;G. Wagner;G. Nolze;O. Moretzki
本文综述了陨石（Fe，Ni）_3P的一些特征。（Fe，Ni）_3P是大多数铁陨石中丰富而重要的副相。这种矿物（名为菱铁矿/菱杆岩）在所谓的Widmanstätten模式的形成过程中起着决定性的作用。不同的透射以及扫描电子显微镜技术已被应用到获得更精确的信息的真实的结构的磷化物晶体，它们的化学成分和金属分布在phoshide/ kamacite界面。已经对来自各种铁陨石（托卢卡、北智利、沃森、橙子河、莫拉斯科、阿格帕利利克、敖德萨、峡谷暗黑破坏神）的选定（Fe，Ni）3 P-晶体进行了X射线晶体结构测定。这些实验揭示了一种金属有序性，即在三个不等价的金属位置上，发现了不同的Ni对Fe的替代。脆性（Fe，Ni）3 P样品的完美性明显不同，似乎取决于每个陨石的热历史。此外，在富Ni的棒铁矿晶体内，已经检测到CrN（carlsbernitride）的小单晶夹杂物。（© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
A survey is presented on some characteristic features of meteoritic (Fe,Ni)3P which is an abundant and important minor phase of most iron meteorites. This mineral (named schreibersite/rhabdite) plays a decisive role during the formation of the so‐called Widmanstätten pattern. Different transmission as well as scanning electron microscopic techniques have been applied to get more precise information about the real structure of the phosphide crystals, their chemical composition and the metal distribution across the phoshide/ kamacite interface. X‐ray crystal structure determinations have been performed for selected (Fe,Ni)3P ‐ cystals from various iron meteorites (Toluca, North Chile, Watson, Orange River, Morasko, Agpalilik, Odessa, Canyon Diablo). These experiments revealed a metal ordering, i.e. for the three non‐equivalent metal positions a different substitution of Fe by Ni has been found. The perfection of the brittle (Fe,Ni)3P samples differs appreciably and seems to be dependent on the thermal history of each individual meteorite. Moreover, inside Ni‐rich rhabdite crystals small monocrystalline inclusions of CrN (carlsbergite) have been detected. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)