Editing Kamacite (section)

==Crystallography==
Kamacite is an [[Cubic crystal system|isometric]] mineral with a body cubic centered unit cell. Kamacite is usually not found in large crystals; however the anomalously largest kamacite crystal found and documented measured 92×54×23 centimeters.<ref>{{cite journal| url = http://www.minsocam.org/ammin/AM66/AM66_885.pdf| journal = American Mineralogist| volume = 66| pages = 885–907| year= 1981| title= The largest crystals| author = P. C. Rickwood}}</ref> Even with large crystals being so rare, [[crystallography]] is extremely important to understand plays an important role in the formation of Thomson structures.

===Symmetry===
Kamacite forms [[Cubic crystal system|isometric]], hexoctahedral crystals this causes the crystals to have many symmetry elements. Kamacite falls under the 4/m{{overline|3}}2/m class in the [[Hermann–Mauguin notation]] meaning it has three fourfold axes, four threefold axes, and six twofold axes and nine mirror planes. Kamacite has a space group of Fm{{overline|3}}m.

===Unit cell===
Kamacite is made up of a repeating unit of α-(Fe, Ni), {{chem|Fe|0.9|Ni|0.1}}, which makes up cell dimensions of a = 8.603&nbsp;[[Ångstrom|Å]], Z = 54&nbsp;[[Ångstrom|Å]]; V = 636.72&nbsp;[[Ångstrom|Å<sup>3</sup>]]. The interatomic magnetic and quantum interactions of the [[zerovalent iron]] (metallic Fe<sup>0</sup>) atoms interacting with each other causes kamacite to have a body centered lattice.