LANTHANIDES

Carbides

Class III

• Interstitial Carbides
• Close-Packed M with C in Octahedral Interstices

  e.g. (Tb,Ho,Y)₂Canti-CdCl₂ structure

Class II

• Occurrence with La - Ho
• M₃CC randomly distributed in ¹/₃ of Octahedral holes in ccp M
• M₂C₃Pu₂C₃ structure ~ C₂ groups
• MC₂CaC₂ structure ~ C₂ groups
• Metallic lustre & conductivity Þ not salt-like
• Hydrolysis of (La,Ce)C₂ at ambient temperature Æ ethyne, C₂H₂

If you have any comments please contact stephen.heyes@chem.ox.ac.uk 

Main Introduction I1 I2 I3 I4 I5 Lanthanides L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15

Actinides A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 General Data1 Data2 Problems Help

To the Oxford Chemistry IT Centre Homepage

© S.J. Heyes, Oxford, 1997-8