ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
On Hexagonal Perovskites with Cationic Vacancies. XX. Ba6Nb4Zr□o18 - a New Stacking Polytype with a Rhombohedra1 18 L StructureThe white Ba6Nb4Zr□O18 crystallizes in a rhombohedral 18 L structure (a = 5.821 Å; c = 42.63 Å; space group R3m) with three formula units for the trigonal setting (ϱexp = 6.05 g/cm3; ϱcalc = 6.271 g/cm3). The corresponding TiIV and HfIV compounds, Ba6Nb4Zr□O18 and Ba6Nb4Hf□O18, are isotypic.
Notes:
Das weiße Ba6Nb4Zr□O18 kristallisiert in einer rhomboedrischen 18 L-Struktur (a = 5,821 Å; c = 42,63 Å; R. G. R3m) mit drei Formeleinheiten pro trigonal aufgestellter Zelle (ϱgef = 6,05 g/cm3; ϱber = 6,271 g/cm3). Die entsprechenden Verbindungen mit TiIV und HfIV, Ba6Nb4Ti□O18 und Ba6Nb4Hf□O18 sind isotyp.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19804650121
