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陨石显微镜透明丝状物特征科学杂谈 |
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Hexahedrite（方陨铁，即六面体铁陨石）
Hexahedrites are a type of iron meteorite. They are composed almost exclusively of the nickel-iron alloy kamacite, and are lower in nickel content than the Octahedrites.
（方陨铁是铁陨石的一种类型。几乎全部由铁纹石组成，镍成分低于八面体陨铁）The name comes from the cubic (i.e. hexahedron) structure of the kamacite crystal. After etching, hexahedrites do not display a Widmansttten pattern, but they often do show Neumann lines: parallel lines that cross each other at various angles, and are indicative of impact shock on the parent body. They are named after Franz Ernst Neumann, who discovered them in 1848.
（名字来源于铁纹石的立方体，六面体的结构。经过酸蚀处理后，六面体陨铁不会呈现维斯台登构造，而是常常露出纽曼线：即按照不同角度相互交叉的平行线，这说明陨石的母体遭受了
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杂谈 |
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给大家欣赏一下陨铁中不同的“维斯台登构造
”！
characteristic cross-hatched pattern
that becomes visible on the surface of octahedrites (the commonest
type of iron meteorites) and pallasites after polishing and etching
with nital (nitric acid in solution with ethanol). It is due to an
intergrowth of crystals of nickel-rich taenite and nickel-poor
kamacite. It is named after its discoverer, the Austrain
mineralogist Alois von Beckh Widmanst鋞ten (1754-1849).
第二张介绍
Oktaedryt drobnoziarnisty: Gibeon
Sawn slab of the Gibeon (IVA) iron meteorite. This meteorite has a
distinct Widmanst鋞ten pattern.
第三张介绍
Odessa
Ector County, Texas, USA
Found 1922
Iron (IAB) Course
3 kilo Individual
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福建典型石铁陨石石英陨石熔融杂谈 |
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