CPC Subgroup
C01B 33/28 Full Title
Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956) > Silicates (persilicates C01B15/14 ) > Aluminium-containing silicates
1 direct subcode
Child Classifications
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