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Ein Calciumurannitrid — (Ca 3 U)N 4 — mit Natriumchloridstruktur
Author(s) -
Heckers Uwe,
Jacobs Herbert,
Kockelmann Winfried
Publication year - 2003
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.200300272
Subject(s) - neutron diffraction , sodium , crystallography , microcrystalline , chemistry , uranium , hydride , inorganic chemistry , nuclear chemistry , mineralogy , crystal structure , materials science , hydrogen , metallurgy , organic chemistry
Mixtures of calcium amide, Ca(NH 2 ) 2 and uranium hydride, UH 3 were reacted at temperatures between 600 °C and 1000 °C for 2d to 30d. Starting with a mixture 3 : 1 a singlephase, black, microcrystalline product is obtained. As a result of X‐ray and neutron diffraction the phase has the composition (Ca 0, 75 U 0, 25 )N = Ca 3 UN 4 . It crystallizes in the space group Fm3¯m with a = 4.9398 (1) Å in the sodium chloride structure type with statistical occupation of the cation site 4a by 3Ca and 1U.