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About Binary and Ternary Alkaline Earth Metal Nitrides
Author(s) -
Reckeweg Olaf,
DiSalvo Francis J.
Publication year - 2001
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 - 10.1002/1521-3749(200103)627:3<371::aid-zaac371>3.0.co;2-a
Subject(s) - alkaline earth metal , powder diffraction , ternary operation , crystallography , metal , materials science , phase (matter) , chemistry , nuclear chemistry , analytical chemistry (journal) , metallurgy , computer science , programming language , organic chemistry , chromatography
Abstract Binary and ternary alkaline earth metal nitrides compounds have been synthesized and characterized by the means of X‐ray structure analysis. By the reaction of the alkaline earth metals Be, Mg, and Ca with dry nitrogen, we obtained crystalline material of Be 3 N 2 ( 1 ), Mg 3 N 2 ( 2 ), and Ca 3 N 2 ( 3 ), respectively. For these three compounds we could confirm the cubic anti bixbyite structure (Ia3 (#206); 1 : a = 814.92(1) pm; 2 : 997.26(6) pm and 3 : a = 1147.86(2) pm). By reacting 1 : 2 : 1 mixtures of Ae (Ae = Ca, Sr) : Mg : NaN 3 we synthesized the ternary nitrides CaMg 2 N 2 ( 4 ) and SrMg 2 N 2 ( 5 ). We confirmed the structural data obtained by Rietveld‐analysis of X‐ray powder diffraction data for 4 and found 5 to be isotypic (anti‐C–M 2 O 3 structure, trigonal, P 3ml (#164); 4 : a = 354.77(5) pm, c = 609.60(12) pm; 4 : a = 362.20(5), c = 635.90(13) pm). The indexing of the powder diffractogram of “Ca 3 Mg 3 N 4 ” and refining the lattice parameters (hexagonal, a = 352.9(2) and c = 607.5(5) pm) suggest its identity with 4 . The black “low‐temperature phase of Ca 3 N 2 ” has been synthesized and and the X‐ray powder diffractogram has been recorded. The reactions of this phase are also described. The yellow “high‐temperature phase of Ca 3 N 2 ” was found to be Ca 4 N 2 (CN 2 ).