|  | C |
SECTION C — CHEMISTRY AND METALLURGY

|  | C |
Note(s) Definitions for Section C: Alkali metals: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: Ca, Sr, Ba, Ra Lanthanides: elements with atomic numbers 57 to 71 inclusive Rare earths: Sc, Y, Lanthanides Actinides: elements with atomic numbers 89 to 103 inclusive Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W Halogens: F, Cl, Br, I, At Noble gases: He, Ne, Ar, Kr, Xe, Rn Platinum group: Os, Ir, Pt, Ru, Rh, Pd Noble metals: Ag, Au, Platinum group Light metals: alkali metals, alkaline earth metals, Be, Al, Mg Heavy metals: metals other than light metals Iron group: Fe, Co, Ni Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens Metals: elements other than non-metals Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

METALLURGY

|  | C30 |
CRYSTAL GROWTH (separation by crystallisation in general Fulltext... Hierarchy... Expanded...B01D 9/00) [3]

|  | C30B |
SINGLE-CRYSTAL GROWTH (by using ultra-high pressure, e.g. for the formation of diamonds Fulltext... Hierarchy... Expanded...B01J 3/06); UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIALS OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIALS; AFTER-TREATMENT OF SINGLE CRYSTALS (for producing semi-conductor devices or parts thereof Fulltext... Hierarchy... Expanded...H01L); DOPING PROCESSES FOR CRYSTALS IN GENERAL (for producing semi-conductor devices or parts thereof Fulltext... Hierarchy... Expanded...H01L); REFINING BY ZONE-MELTING OF MATERIALS IN GENERAL (zone-refining of metals or alloys Fulltext... Hierarchy... Expanded...C22B); APPARATUS THEREFOR [3]

|  | C30B |
Note(s) In this sub-class, the term "single crystal" includes also twin crystals and a predominantly single crystal product. [3] Inventions dealing with the preparation of single crystals of particular materials or shapes are classified in the group for the process as well as in group Fulltext... Hierarchy... Expanded...C30B 29/00. [3] Apparatus specially adapted for a specific process is classified in the appropriate group for the process. Apparatus to be used in more than one kind of process is classified in group Fulltext... Hierarchy... Expanded...C30B 35/00. [3]