ISSN:
1572-8854
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Geologie und Paläontologie
,
Physik
Notizen:
Abstract Crystallographic examination of samples of Cs2Li[M III (CN)6] (M III =Mn, Cr), prepared by an improved route, establishes the unit cells as very closely approximating to face-centered cubic with lattice constantsa=10.64(1) (M III =Mn) and 10.75(1) Å (M III=Cr). Although a few weak non-face-centered cubic reflections and splittings were detected by powder neutron diffraction, refinement inFm3m was as good as in primitive cubic or tetragonal space groups. Single-crystal neutron-diffraction refinements inFm3m yield bond lengths Mn-C=1.980(5) Å, Cr-C=2.03(1) Å, and C-N=1.188(5) and 1.20(1) Å, respectively. At 4.2 K, neutron powder data indicate the presence of further non-face-centered lines for both compounds, with contraction of unit-cell parameters to 10.55(1) and 10.67(1) Å, respectively.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01171024
Permalink