The caking behaviour of vitrain and clarain could be improved after the coal has been picked out.
Source: wiktionary
Vitrain
Synonyms for "vitrain" (1 found)
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3 total sentences available.
In order to measure relatively accurately the activation energy of coal, and to exclude the disturbance from coal samples, the hand-picked banded vitrains in bright coal are adopted as experimental samples (Table 1).
Source: wiktionary
Thus, it may be concluded that a lower viscosity of plastic vitrain grains facilitates pores to grow and coalesce and grains to stick to one another to create intergrain pores.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.