A nitrogen‐rich aluminosilicate with nominal composition La17Si9Al4N33 has been synthesised at 1500–1650 °C under a N2 atmosphere by reaction of La metal, AlN and Si3N4. Its crystal structure was solved and refined in space group F 3m, with a = 15.4279(6) Å and Z = 4, to Rf = 1.9 %. The structure contains two novel types of discrete tetrahedral aluminosilicate clusters, with respective nominal compositions Al4Si4N17 and Si5N16, with La atoms in between. Bulk samples were also investigated by powder X‐ray and electron diffraction. The 29Si and 27Al solid‐state NMR results indicate that the phase contains minor amounts of oxygen and has a narrow compositional range with probable end limits La17Si9Al4N33 and La16.67Si9Al4N32O.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
No takes yet. Share an insight, caveat, or question.
Pilet et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: