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Intergrowth Phases of Tetragonal Rare Earth Boride Carbides
Author(s) -
Oeckler Oliver,
Duppel Viola,
Bauer Josef,
Mattausch Hansjürgen,
Simon Arndt
Publication year - 2002
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(200207)628:7<1607::aid-zaac1607>3.0.co;2-m
Subject(s) - tetragonal crystal system , crystallography , chemistry , carbide , rare earth , boride , materials science , mineralogy , crystal structure , metallurgy , inorganic chemistry
Tetragonal rare earth boride carbides with structure types derived from La 5 B 2 C 6 and Sc 3 C 4 , respectively, can intergrow coherently. Slabs of both types with various thicknesses from one unit‐cell parameter up to macroscopic domains may grow together, sharing a common square net of metal atoms. There is a tendency towards phase separation in order to achieve long‐range order. However, phasoid‐like crystallites have also been observed. Long‐range order is also achieved by the formation of ordered intergrowth compounds. They are characterised by a regular periodic sequence of lamellar slabs (each of one or a few unit cells thickness) of both basic structure types.