We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
A bar above a figure marking a negative index.
Also known as: Negative Miller index, Index overbar, Bar one notation
The bar written above a Miller index figure to mark a negative intercept, read aloud as bar.
Marks a negative crystallographic index by a bar above the figure rather than a minus sign before it.
Contexts: Laboratory
Keeps each index to one character wide, which is what allows three of them to be written together without separators and still be read unambiguously.
Contexts: Laboratory
A short horizontal line drawn directly above a figure rather than a minus sign written before it.