The name comes from the cubic (i.e. hexahedron) structure of the kamacite crystal. After etching, hexahedrites do not display a Widmanstätten 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. These lines are named after Johann G. Neumann, w...
Found on
http://en.wikipedia.org/wiki/Hexahedrite
(from the article `iron meteorite`) ...been grouped according to their crystal structure, which can be revealed through etching a polished cross section of the meteorite with dilute ... ...the three temperature-dependent forms (allotropes) of pure iron, because the kamacite has the same body-centred cubic structure as iron. In the ... ...
Found on
http://www.britannica.com/eb/a-z/h/45
A type IIA hexahedrite that fell in Siberia in 1916 One of the main types of iron meteorite. Hexahedrites have a nickel content of about 6% and are 92% composed of the nickel-iron mineral kamacite. Their name derives from the cubic (hexahedral) cleavage of alpha-Fe, Ni single crystals. Etching ...
Found on
http://www.daviddarling.info/encyclopedia/H/hexahedrite.html
No exact match found.
