In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2003, No. 18 ( 2003-09), p. 3425-3431
Kurzfassung:
The intermetallic compounds Li 2 PtSn, Li 3 Pt 2 Sn 3 , Li 2.27 Pt 2 Sn 3.73 and Li 2.43 Pt 2 Sn 3.57 were synthesised by reaction of the elements in sealed tantalum tubes. They were investigated by X‐ray diffraction on powders and single crystals: F $\bar 4$ 3 m , a = 626.0(1) pm, wR 2 = 0.0834, 70 F 2 values, 7 variables for Li 2 PtSn; Ia $\bar 3$ , a = 1264.3(1) pm, wR 2 = 0.0340, 416 F 2 values, 23 variables for Li 3 Pt 2 Sn 3 ; Ia $\bar 3$ , a = 1269.7(1) pm, wR 2 = 0.1130, 521 F 2 values, 24 variables for Li 2.27(1) Pt 2 Sn 3.73(1) ; Ia $\bar 3$ , a = 1266.6(1) pm, wR 2 = 0.1094, 620 F 2 values, 25 variables for Li 2.43(1) Pt 2 Sn 3.57(1) . The latter refinement was based on a crystal twinned by merohedry. Li 2 PtSn crystallises with an ordered variant of the BiF 3 type. The other stannides adopt a superstructure of the fluorite type where all three subcell axes are doubled. In Li 3 Pt 2 Sn 3 the platinum atoms are located on the calcium sites while the tin and 1/3 of the lithium atoms are ordered on the fluorine site. The remaining lithium atoms fill octahedral voids of the fcc arrangement of platinum. The superstructure is discussed on the basis of a group‐subgroup scheme and experimental evidence is given for a solid solution Li 3− x Pt 2 Sn 3+ x . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
Materialart:
Online-Ressource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2003:18
DOI:
10.1002/ejic.200300318
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2003
ZDB Id:
1475009-0
Permalink