| ReturnTo Theme-Group-Choice | Onelevelup |
| 4G002 | Compounds of iron (I) | |
| C01G49/00 -49/08@Z | ||
| C01G49/00-49/08@Z | AA | AA00 CONSTITUENT ELEMENTS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
| . Oxygen containing | . . Comprising of only Fe and O | . . . Fe2O3 (hematite, maghemite, etc.) | . . . Fe3O4 (magnetite, etc.) | . . Compounds made only of Fe, O, H, (geotite, hydrous iron oxides) | . . Composed of metals except for iron | . . . Compounds containing Mn and Zn | . . . Containing any of the Ba, Sr, Pb and C3 | . . . Containing rare earth element (garnet, etc.) | . . . Containing Co | |||
| AA11 | AA12 | AA13 | ||||||||||
| . . . . Consisting of only fe, Co and O | . . Composed of nonmetals except for O and H (e.g. Si, P organic substances) | . Others | ||||||||||
| AB | AB00 MANUFACTURING AND PROCESSING METHODS |
AB01 | AB02 | AB03 | AB04 | AB05 | AB06 | AB07 | ||||
| . Dry processes only (e.g., gas phase, oxidation) | . Methods including wet processes | . . Blowing-in of gas containing O2 (under acid conditions, etc.) | . . . Under alkaline conditions | . . Adhesion (hydrolysis in the presence of particles) | . . Heat treatments with inactive conditions | . . Thermal decomposition of organic substances | ||||||
| AC | AC00 RAW MATERIALS |
AC01 | AC02 | AC03 | ||||||||
| . Waste liquids | . . Acid waste liquids | . Solid wastes (e.g., sludge, dust, etc.) | ||||||||||
| AD | AD00 FORMS |
AD01 | AD02 | AD03 | AD04 | |||||||
| . Needle forms | . Flat, layer, and mica-like forms | . Rice grain-like and spheroid forms | . Others (e.g., burred, globular) | |||||||||
| AE | AE00 USEFULNESS |
AE01 | AE02 | AE03 | AE04 | AE05 | ||||||
| . Pigments | . Magnetic substances | . . For a magnetic recording medium | . . For a permanent magnet | . Others (e.g., catalysts) | ||||||||
| AF | AF00 EQUIPMENT |
AF01 | ||||||||||
| . Equipment |