Crystal structure and magnetic properties of the ternary germanide U{sub 3}Co{sub 4}Ge{sub 7}: An intergrowth of CaBe{sub 2}Ge{sub 2-} and Cu{sub 3}Au-type slabs
- Universite Bordeaux, Talence (France); and others
An electron and X-ray diffraction investigation of powder and single crystals shows that U{sub 3}Co{sub 4}Ge{sub 7} crystallizes in a tetragonal structure with the space group I4/mmm,: a = 410.87(7) pm, c = 2747.7(9) pm, V = 0.4638(2) nm{sup 3}, Z = 2, R = 0.039 for the Rietveld refinement, and R = 0.050 for the single-crystal study (373 F values and 21 variables). Its structure shows some similarities with that of Eu{sub 2}Pt{sub 7}AlP{sub 4-x} and can be interpreted as an intergrowth of CaBe{sub 2}Ge{sub 2-} and Cu{sub 3}Au-type blocks. U{sub 3}Co{sub 4}Ge{sub 7} orders ferro- or ferrimagnetically at 21.5(5) K and exhibits another magnetic transition below 20.5(3) K. Its properties are compared to those observed for other ternary germanides such as UCo{sub 2}Ge{sub 2} and UCoGe.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 508683
- Journal Information:
- Journal of Solid State Chemistry, Vol. 115, Issue 1; Other Information: PBD: 15 Feb 1995
- Country of Publication:
- United States
- Language:
- English
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