TiNiSi-type

SiCo6/5Co4/5], that is total coordination 10 of Co around Si with 6/5 + 4/5 = 10/5 = 2 Co atoms for each Si atom). A ternary derivative of this type is the oP12-TiNiSi type (prototype of the so-called E phases). 

Figure 7.34. Projection of four cells of the oP12-TiNiSi type structure.

Co atoms for each Si atom. A ternary derivative of this type is the oP12-TiNiSi type (prototype of the so-called E phases). 

The ternary variant TiNiSi type is also called E-phase structure. Many ternary compounds belonging to a MeTX formula (Me = rare earth metal, Ti, Hf, V, etc., T = transition metal of the Mn, Fe, Pt groups, X = Si, Ge, Sn, P, etc.) have this structure. Strukturbericht designation C23. 

EuPdSb crystallizes with the TiNiSi type structure, a = 0.7627, b = 0.4695, c = 0.7925 (Malik and Adroja, 1991c powder X-ray diffraction data). Starting elements (Eu 4N, Pd 4N, Sb 4N) were arc melted under argon. 

Lu-Ag-Sb. The formation of LuAgSb compound with TiNiSi type was observed by Sologub et al. (1995a) from an arc melted and annealed at 870 K alloy by using X-ray powder diffraction. 

Lattice parameters of the Cei xLa> RhSb alloys, TiNiSi type structure... 

Substitution of Ce by La in Cei LaxRhSb, x = 0.1-1.0, TiNiSi type structure (table 6) was investigated by Malik et al. (1995) in the course of studying of some of the physical properties of these phases. 

An extended Zintl formirlation is also possible for Yb Mg Ge (Merlo et al. 1993) with TiNiSi-type structure. In contrast to YbLiGe, the ytterbium atoms in YbMgGe should not carry a magnetic moment and one should expect PauU paramagnetism or small temperatiure-independent paramagnetism (TIP), hr view of the missing magnetic data, this remains an open question. 

So far only three YbTAs arsenides are known (table 10). YbLiAs (Albering 1993, Albering et al. 1997) crystallizes with the TiNiSi type structure. In this arsenide, the lithium atoms occupy the typical transition-metal site and we observe puckered Lis Ass networks. 

The susceptibility of the two modifications of YbPdSn was investigated in the temperature range 100 to 750 K (Sendlinger 1993). The ytterbium valence in HT-YbPdSn with TiNiSi-type stmcture continuously increases from -f2.05 at lOOK to -1-2.10 at 300 K and then to -1-2.40 at about 750 K. The degree of trivalent ytterbitun increases with temperature for both modifications. For LT-YbPdSn a saturation at about -f-2.6 occurs at about 600 K. 

DyCoSi is orthorhombic with the TiNiSi-type of structure Pnma, a = 6.819, b = 4.172 and c = 7.174 (X-ray powder data by Yarovets, 1978) for sample preparation and atomic parameters, see YNiSi. 

Chevalier et al. (1982a) reported DyRhSi to crystallize with the TiNiSi-type of structure (Pnma, a = 6.835(1), b = 4.1931(5) and c = 7.338(1) X-ray powder diffraction). For sample preparation, see YRhSi. DyRhSi shows spontaneous magnetization below = 25 K and a noncolUnear arrangement of the moments was said to be likely the paramagnetic behavior is characterized by = 10.31 mol and... 

LuCoSi is orthorhombic with the TiNiSi-type structure Pnma, a = 6.656,6 = 4.075... 

NdFeSi was claimed to be single-phase with an orthorhombic TiNiSi-type of structure. The lattice parameters (a = 11.18, b = 6.89 and c = 5.32), however, do not correspond to a TiNiSi-type unit cell. The existence of a compound NdFeSi was confirmed by Bodak et al. (1970) but at variance with Mayer and Felner (1973) a PbFCl-type of structure [P4/nmm, a = 4.057(3), c = 6.893(5)] was obtained from arc-melted alloys heat treated at 800 ° C for 3 months (low-temperature phase ). Due to the high temperature of preparation and homogenization the TiNiSi-type phase as reported by Mayer and Felner (1973) is likely to represent a high-temperature modification. 

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