View source for Weiss zone law

<font color="blue">Loi de la zone de Weiss</Font> (''Fr''). <font color="red">Weiss-Zonen Gesetz</font> (''Ge''). <font color="black">Legge della zona di Weiss</font> (''It''). <font color="purple">ワイス晶帯則</font> (''Ja''). <font color="green">Ley de la zona de Weiss</font> (''Sp'').



'''Weiss zone law''', also known as '''Weiss zone rule''', states that a lattice direction with [[direction indices|indices]] [''uvw''] is contained in a lattice plane with [[Miller indices]] (''hkl'') if the following condition is satisfied:

<center>''hu'' + ''kv'' + ''lw'' = 0</center>

A direction with indices [''uvw''] passes through lattice nodes with coordinates ''nu'',''nv'',''nw''; for ''n'' = 0 the direction passes through the origin. A lattice plane of the family (''hkl'') passes through the origin if ''hx'' + ''ky'' + ''lz'' = 0, where ''x'',''y'',''z'' are the coordinates of any point on the plane. By replacing ''x'',''y'',''z'' with ''u'',''v'',''w'' we obtain Weiss zone law.

[[Category:Fundamental crystallography]]