ChemInform Abstract: Composition and Physical Properties of the Most Germanium-Rich Germanide of Manganese.

ChemInform Abstract

Mn₁₁Ge₈ (I) and Mn₃Ge₂ (II) are prepared by melting stoichiometric mixtures of the elements (1273 K, 1 h, argon). Free Ge is found to exist in the annealed (953 K, 250 h) sample of (I). MnGex compounds with 0.664 ≤ x ≤ 0.753 are synthesized by a powder metallurgical technique using (I) and (II) as starting materials. The apparent density, resistivity, and magnetization of these alloys change drastically in the narrow range 0.700-0.706. The most Ge-rich compound is found to be Mn₄₄Ge₃₁.