Structure du pentasulfure d'europium et d'étain Eu₂SnS₅

Synthesis, Structural, and Optical Characterization of a New Europium(II) Tin Selenide, Eu8(Sn4Se14)(Se3)2 with a (Sn4Se14)12– Building Block

“…The structures of Eu 2 SnS 5 [10] and Eu 8 (Sn 4 Se 14 )-(Se 3 ) 2 are similar in many ways. Both contain 9-coordinate Eu II atoms, both contain (Q 3 ) 2± anionic chains (Q = S, Se), and both contain two crystallographically distinct tin atoms.…”

“…The program PLATON [25] was used to determine if the structure of Eu 8 (Sn 4 Se 14 )(Se 3 ) 2 could be solved in a centrosymmetric space group. (2) 2.544(1) Sn(2)±Se(11) 2.520(2) Sn(1)±Se (9) 3.028 (2) Eu (1)±Se (2) 3.084(2) Eu(1)±Se (7) 3.183 ( (2) 95.75(4) Se(9)±Sn(2)±Se(1) 101.69(6) Se(3)±Sn(1)±Se (9) 171.32(5) Se(9)±Sn(2)±Se(11) 120.67(5) Se(6)±Sn(1)±Se (9) 83.67 (5) Se (5) (7) Se(8)±Se(12)±Se(8') 106.93(10) Se(7)±Se(10)±Se(7') 105.43 (10) Nevertheless, the only space group with an acceptable solution was found to be P2 1 2 1 2. Second harmonic generation experiments are needed to determine if P2 1 2 1 2 is indeed the correct space group.…”

Crystal architecture of R 2SnS5 (R = Pr, Nd, Gd and Tb): crystal structure relationships in chalcogenides

“…Blocks of paired tri-capped trigonal prisms in the structures of Eu 2 SnS 5 ( Fig. 2d; Jaulmes et al, 1982) and R 2 SnS 5 (La 2 SnS 5 structure type) are similar within local space, but overall the structural fragments of Eu 2 SnS 5 and R 2 SnS 5 (La 2 SnS 5 structure type) are different.…”

“…The Eu-Sn-S system is more complicated and four crystalline products can be isolated. The crystal structures of Eu 2 SnS 5 (Eu 2 SnS 5 structure type, space group Pbam; Jaulmes et al, 1982), Eu 5 Sn 3 S 12 (Eu 5 Sn 3 S 12 structure type, space group Pmc2 1 ; Jaulmes & Julien-Pouzol, 1977a), Eu 3 Sn 2 S 7 (Eu 3 Sn 2 S 7 structure type, space group Pbam; Jaulmes & Julien-Pouzol, 1977b) and Eu 2 SnS 4 (Eu 2 SnS 4 structure type, space group Pnma; Pocha et al, 2003) have been determined.…”

Crystal structures of the R2Pb3Sn3S12 (R=La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er and Tm) compounds

“…The formation of the compounds R 2 SnS 5 (R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy) (La 2 SnS 5 structure type, space group Pbam) [6][7][8] and Eu 2 SnS 5 (Eu 2 SnS 5 structure type, space group Pbam) [9] in the R 2 S 3 -SnS 2 sections has been reported.…”