Structure Refinement by the Rietveld Method of the Thiogermanates [(CH3)4N]2MGe4S10(M= Fe, Cd)

First-principle study of the half-metallic ferromagnetic compound [(CH3)4N]2FeGe4S10

“…In this paper, we present the results of self-consistent first-principle calculations for the compound thiogermanate [(CH 3 ) 4 N] 2 FeGe 4 S 10 [14] and predict that it is half-metallic. The crystal and molecular structure of [(CH 3 ) 4 N] 2 FeGe 4 S 10 is shown in Fig.…”

Structural characterization of heteropolymeric iron and main group metal complexes

“…The red tetragonal (NMe 4 )Fe(S) 10 Ge 4 was studied by three groups (Achak et al , 1996 ;Bowers et al , 1996 ;Akari et al , 1998 ), the crystallographic and structural data are in good agreement. The sulfur atoms bridged to metal atoms and are tetrahedrally coordinated [Fe(II)S 4 , Ge(IV)S 4 ] with mean M-S bond distances of 2.37 (M = Fe) and 2.19 (M = Ge).…”

“…The inner coordination sphere about the M atoms are: MgN 4 O 2 (Johnson et al , 1991 ), CaN 4 O 2 (Mayer and Pichard , 1988 ) and CaO 7 (Cohen and Hoard , 1966 ;Pavelč í k and Kettmann, 1983 ); SrO 9 + SrO 10 (Burger and Kl ü fers, 1966b ), SrO 3 N 2 + SrO 8 (Meyer and Pickerdt , 1989 ), Sr 4 O 2 (Castellano et al , 1977 ) and SrN 5 ( H ö hn et al, 1991 ); BaO 8 (Burger and Kl ü fers, 1966a,b ;Calogero et al , 1977 ), BaO 3 N 3 + BaO 5 N 2 (Meyer and Pickerdt , 1989 ), BaN 5 ( H ö hn et al, 1991 ), BaO 5 N 4 + BaO 2 N 2 (Kl ü fers and Hauss ü l, 1985 ), BaN 5 O 4 (Navaza et al , 1990 ), BaO 11 (Solans et al , 1984b ) and BaO 9 (Chuklianova et al , 1981 ); InFe 4 (Che -Chieh et al, 1993 ), TlN 6 (Swartner et al , 1997 ), TlO 7 (Solans et al , 1984a ) and TlN 3 (Yukle et al , 1996 ); GeS 4 (Achak et al , 1996 ;Bowers et al , 1996 ;Akari et al , 1998 ), GeSe 4 (Akari et al , 1998 ); SnC 3 ON + SnC 3 N 2 (Adam et al , 1990 ;Behrens et al , 1991 ;Schwarz et al , 1996 ;Yian et al , 1996 ), SnC 3 O 2 (Graziani et al , 1980 ); BiCl 6 (Mammano et al , 1977 ), BiCl 2 Fe 2 (Enland et al , 1997 ), ZnC 4 Fe 2 (Pierpont et al , 1982 ), CdN 5 O (Mulliza et al , 1990 ), HgC 2 Fe 2 (Sosinski et al , 1983 ) and HgS 4 (Cingi et al , 1985 ).…”

“…The iron atoms exist in the oxidation states 0, + 2 and + 3, from which + 3 by far prevails. The inner coordination sphere about iron atoms are Fe (0) (Achak et al , 1996 ), Hg (Sosinski et al , 1983 ), FeC 10 (Mammano et al , 1977 ;Graziani et al , 1980 ;Yukle et al , 1996 ), FeC 3 HBr 2 (Enland et al , 1997 )]; Fe(II): [FeN 3 ( H ö hn et al, 1991 ), FeS 4 (Achak et al , 1996 ;Bowers et al , 1996 ;Akari et al , 1998 ), FeC 6 (Adam et al , 1990 ;Behrens et al , 1991 ;Schwarz et al , 1996 ;Yian et al , 1996 ), FeN 5 O and FeN 4 O 2 (Cingi et al , 1985 )]; Fe(III): [FeC 5 N (Castellano et al, 1977, Kl ü fers andHauss ü l, 1985 ;Mulliza et al , 1990 ;Navaza et al , 1990 ;Johnson et al , 1991 ), FeC 6 (Mayer and Pichard , 1988 ;Meyer and Pickerdt , 1989 ;Swartner et al , 1997 ), FeO 4 N 2 (Pavel č í k and Kettmann, 1983 ), FeO 6 (Burger and Kl ü fers, 1966a,b ;Calogero et al , 1977 ), FeO 5 N 2 (Cohen and Hoard , 1966 ;Solans et al , 1984a,b ), and FeO 4 N 3 (Chuklianova et al , 1981 )]. The mean Fe(0)-L bond distance elongated in the order: 1.69 ( μ -H) < 1.78 ( μ -CO) < 2.045 (C, cp) < 2.317 (Zn) < 2.522 (Hg) < 2.627 (In) < 2.641 (Bi).…”

Room‐Temperature Synthesis of Three Compounds Featuring the [Ge4S10]4– Anion from a Water‐Soluble Thiogermanate Precursor

“…The [Ge 2 S 7 ] 6– unit is obtained by corner linkage of two [GeS 4 ] 4– groups . Connection of four [GeS 4 ] 4– tetrahedra through common corners generates the adamantane‐like [Ge 4 S 10 ] 4– moiety, which was observed in several inorganic thiogermanates . A slightly different connection mode of the [GeS 4 ] 4– tetrahedra leads to generation of the [Ge 8 S 19 ] 6– ion .…”