ISSN:
1434-4475
Schlagwort(e):
Barium
;
Strontium
;
Mercury
;
Oxygen
;
High-pressure synthesis
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Summary Ba0.75Sr0.25HgO2 was prepared for the first time by an oxygen high-pressure technique. Single cystal X-ray investigations lead to hexagonal symmetry, space group D 6 6 -P6322;a=6.897;c=11.986 Å;Z=6. Hg2+-ions show a dumbbell-like coordination by two O2−-ions. The alkaline earth ions Ba2+ and Sr2+ are surrounded by deformed trigonal O2−-prisms. Only one of the two Ba2+ point positions of the BaHgO2-type can be substituted by Sr2+. Polyhedra size and deformation are discussed in respect to the exchange of Ba2+ by Sr2+.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00808371
Permalink