filler coke

https://doi.org/10.1351/goldbook.F02364
The main @C01281@ of a @C00823@, introduced as solid component (predominantly in the form of @P04433@) into the '@C00842@' from which @P04730@ and @P04731@ materials are obtained by heat treatment.
Note:
@F02363-1@ @C01142@ is not necessarily the only, but it is commonly the most important @F02363-2@ material used in a '@C00842@' which consists of @F02363@ and @B00646@.
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 489 [Terms] [Paper]