- ribbon anisotropic phase
- nas used in Test Method D5061, a group of binder-phase anisotropic carbon textures distinguished by their ribbon-like domains (that is, length (L) to width (W) ratio of L > 4W), and subdivided based on domain width as fine ribbon (2.0- to 12.0-µm), medium ribbon (12.0to 25.0-µm), and coarse ribbon (>25.0-µm) size categories. D5061
ASTM D121-09a Standard Terminology of Coal and Coke. 2014.