A CONTRIBUTION TO THE UNDERSTANDING OF PHASE-EQUILIBRIA [STRUCTURE OFSR7ZRSI6O21]

Authors
PLAISIER JR HUNTELAAR ME DEGRAAFF RAG IJDO DJW
Citation
Jr. Plaisier et al., A CONTRIBUTION TO THE UNDERSTANDING OF PHASE-EQUILIBRIA [STRUCTURE OFSR7ZRSI6O21], Materials research bulletin, 29(7), 1994, pp. 701-707
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
29
Issue
7
Year of publication
1994
Pages
701 - 707
Database
ISI
SICI code
0025-5408(1994)29:7<701:ACTTUO>2.0.ZU;2-B
Abstract
The crystal structure of Sr7ZrSi6O21 is described. Sr7ZrSi6O21, M(r)=1 209.10, triclinic, P1BAR, a=8.398(3)angstrom, b=8.435(2)angstrom, c=8. 445(3)angstrom, alpha=106.13(3)-degrees, beta=106.49(3)-degrees, gamma =105.90(3)-degrees, V=509.0(3)angstrom3, Z=1, D(x)=3.944(3)Mgr/m3. Lam bda(MoKalpha)=0.71069angstrom, F(000)=558, room temperature, final R=0 .073 for 1145 observed reflections. The structure is pseudo rhombohedr al, R3BAR, a(hex)=13.474angstrom, c(hex)= 9.714angstrom, Z=3. The crys tal structure determination establishes the formula for the compound e arlier described in phase equilibria studies as Sr6ZrSi5O18.