A graphite material composed of grains which can be clearly distinguished by means of optical microscopy.
Note:
From the viewpoint of @C01433@, a polygranular @G02684@ is always a @P04723@ but not vice versa. Most industrial @G02684@ materials are polygranular. Monogranular materials consist mostly of @N04193@, such materials are called monolithic or @A00188@.
Source:
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 501 (https://doi.org/10.1351/pac199567030473)