CPC Main Group
C01B 33/00 Silicon; Compounds thereof ( C01B21/00, C01B23/00 take precedence; persilicates C01B15/14; carbides C01B32/956)
6 direct subcodes
Child Classifications
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- C01B 33/02 Silicon (forming single crystals or homogeneous polycrystalline material with defined structure C30B)
- C01B 33/04 Hydrides of silicon
- C01B 33/06 Metal silicides (alloys C22)
- C01B 33/08 Compounds containing halogen
- C01B 33/113 Silicon oxides; Hydrates thereof
- C01B 33/20 Silicates (persilicates C01B15/14 )