Assertion: anthracite | /r/DefinedAs | the coal
Facets:
value: as per iso
type: OTHER
Source sentences:
text: As per ISO 11760:2005, anthracite coal is defined as the coal, synonymous with high-rank coal, having a mean random vitrinite reflectance, equal to or greater than 2.0 % but less than 6.0 %, or, preferably, a mean maximum reflectance, , less than 8.0 % for geologically unaltered coal.