Abstract
AbstractThe intermetallic compounds Li2PtSn, Li3Pt2Sn3, Li2.27Pt2Sn3.73 and Li2.43Pt2Sn3.57 were synthesised by reaction of the elements in sealed tantalum tubes. They were investigated by X‐ray diffraction on powders and single crystals: F$\bar 4$ 3m, a = 626.0(1) pm, wR2 = 0.0834, 70 F2 values, 7 variables for Li2PtSn; Ia$\bar 3$ , a = 1264.3(1) pm, wR2 = 0.0340, 416 F2 values, 23 variables for Li3Pt2Sn3; Ia$\bar 3$ , a = 1269.7(1) pm, wR2 = 0.1130, 521 F2 values, 24 variables for Li2.27(1)Pt2Sn3.73(1); Ia$\bar 3$ , a = 1266.6(1) pm, wR2 = 0.1094, 620 F2 values, 25 variables for Li2.43(1)Pt2Sn3.57(1). The latter refinement was based on a crystal twinned by merohedry. Li2PtSn crystallises with an ordered variant of the BiF3 type. The other stannides adopt a superstructure of the fluorite type where all three subcell axes are doubled. In Li3Pt2Sn3 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 Li3−xPt2Sn3+x. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.