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2005
Lanthanum
I 2700
34- 023
Three New Ethanide Iodides of La: La5I9(C 2), La6I10 (C2) and La10I15(C2)2. — Depending on the reaction temperature, the reaction of a 4:5:3 mixture of La, LaI3, and C
yields the compounds La5I9(C2) (800 °C), La6I10(C 2) (850 °C), or La 10I15(C2)2 (900 °C).
The compound Ce6I10(C 2) is obtained analogously at 850 °C. The four compounds crystallize in the triclinic space group P1 with Z = 2 for La5I9(C2) and Z = 1 for the other
compounds. The crystal structure of La5I9(C 2) contains trigonal bipyramids of La atoms, La6I10 (C2) is characterized by La6 octahedra, and La10I15(C 2)2 contains edge-shared
La10 double octahedra. These La building units are centered by C 2 dumbbells with
C—C bonds in the range1.41—1.47 Å. — (MATTAUSCH*, H.; HOCH, C.; SIMON,
A.; Z. Anorg. Allg. Chem. 631 (2005) 8, 1423-1429; MPI Festkoerperforsch.,
D-70569 Stuttgart, Germany; Ger., Abstr. Eng.) — Schramke
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