The crystal structure of the intermetallic compound Mg₆Si₇Cu₁₆

Sc11Ir4, Sc11Os4, Sc11Ru4 and Zr11Os4 with a new cubic structure type described by means of a cluster concept

“…As can be seen in Table 2, the point positions of Sc~ ~Ir 4 are virtually identical to those given for the Th6Mnz3 type (Florio, Rundle & Snow, 1952) or its ternary version Mg6Cu~6Si 7 (Bergman & Waugh, 1956) except that the 4(a) sites are now occupied. The ternary phase is called the G phase in the Western literature (Spiegel, Bardos & Beck, 1963) but the T phase elsewhere (Markiv & Storozhenko, 1973).…”

Crystal structure and physical properties of Mg6Cu16Si7-type M6Ni16Si7, for M=Mg, Sc, Ti, Nb, and Ta

“…All five compounds were found to be isostructural to Mg 6 Cu 16 Si 7 , a cubic compound with a cell parameter of 11.65 Å and space group Fm3m [7]. An example of the observed X-ray data, the calculated powder diffraction pattern, the difference between the calculated model and the observed data, and positions of expected peaks is presented in Figure 2 for Mg 6 Ni 16 Si 7 .…”

“…The software TOPAS 2.1 (Bruker AXS) was used for Rietveld structure refinements. The published crystal structure of Mg 6 Cu 16 Si 7 was employed as a starting structural model [7]. Magnetization measurements were performed in a Quantum Design PPMS system.…”

“…One variation, an incommensurate structure, has been observed via electron diffraction in rapidly quenched V 6 Ni 16 Si 7 [5,6]. Some members of this family of compounds were synthesized early on [1,7,8,9]; many have not been tested for low temperature magnetic properties or superconductivity [1,7,9]. The chemical variability of the structure type allows for the synthesis of M 6 Ni 16 Si 7, where M=Mg, Sc, Ti, Nb, and Ta resulting in a valence electron difference over the series of up to 3 electrons per M atom (between Mg and Nb or Ta).…”

Thermochemistry of ternary liquid Cu-Mg-Si alloys

“…[9,14] As far as the ternary Cu-Mg-Si phase diagram is concerned, several investigations were performed in different concentration ranges, [15,16,17] and the existence of a number of ternary phases was reported by different authors. [16,[18][19][20] The most prominent feature appears to be a melting point maximum of about 950 ЊC around 33 at. pct Mg and 13 at.…”