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LiCa 3 Si 2 N 5 – A Lithium Nitridosilicate with a [Si 2 N 5 ] 7– Double‐Chain
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.201200106
Subject(s) - crystallography , lattice energy , tantalum , crystal structure , lithium (medication) , chemistry , spodumene , materials science , ceramic , endocrinology , medicine , organic chemistry
The lithium nitridosilicate LiCa 3 Si 2 N 5 was synthesized by the reaction of calcium with Si(NH) 2 and Li 3 N in weld shut tantalum ampoules at 900 °C. The structure of LiCa 3 Si 2 N 5 [space group C 2/ c , no. 15, a = 5.1454(10), b = 20.380(4), c = 10.357(2) Å, β = 91.24(3)°, wR 2 = 0.1084, 863 data, 102 parameters] consists of [Si 2 N 5 ] 7– double‐chains including edge‐sharing tetrahedra. The lithium atoms in the crystal structure are situated in strands along the crystallographic b axis. Lattice energy calculations (MAPLE) and EDX measurements confirmed the electrostatic bonding interactions and the chemical composition. The 29 Si and 7 Li solid‐state MAS NMR spectroscopic investigations are reported.