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LiLa 5 Si 4 N 10 O and LiPr 5 Si 4 N 10 O – Chain‐Type Oxonitridosilicates
Author(s) -
Lupart Saskia,
Schnick Wolfgang
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100381
Subject(s) - crystallography , substructure , lattice energy , lithium (medication) , structure type , ampoule , tantalum , space group , silicate , materials science , chemistry , crystal structure , x ray crystallography , physics , diffraction , medicine , structural engineering , engineering , metallurgy , endocrinology , optics , organic chemistry
The isotypic lithium rare‐earth oxonitridosilicates Li Ln 5 Si 4 N 10 O ( Ln = La, Pr) were synthesized at temperatures of 1200 °C in weld shut tantalum ampoules employing liquid lithium as flux. Thereby, a silicate substructure with a low degree of condensation was obtained. LiLa 5 Si 4 N 10 O crystallizes in space group P $\bar{1}$ [ Z = 1, LiLa 5 Si 4 N 10 O: a = 5.7462(11), b = 6.5620(13), c = 8.3732(17) Å, α = 103.54(3), β = 107.77(3), γ = 94.30(3), wR 2 = 0.0405, 1315 data, 96 parameters]. The nitridosilicate substructure consists of loop branched dreier single‐chains of vertex sharing SiN 4 tetrahedra. Lattice energy calculations (MAPLE) and EDX measurements confirmed the electrostatic bonding interactions and the chemical compositions. The 7 Li solid‐state MAS NMR investigation is reported.