Abstract
The rare earth metal–magnesium–silicides RE2Si2Mg (RE = Y, La–Nd, Sm, Gd–Lu) were prepared by induction melting of the elements in sealed tantalum tubes in a water-cooled sample chamber of a high-frequency furnace. The silicides were investigated via X-ray powder diffraction. The structures of Sm2Si2Mg and Dy2Si2Mg were refined from X-ray single crystal diffractometer data: Mo2FeB2 type, P4/mbm, a = 727.86(7), c = 428.16(6) pm, wR2 = 0.0194, 206 F2 values, 13 variable parameters for Sm2Si2Mg and a = 713.85(7), c = 419.07(6) pm, wR2 = 0.0331, 286 F2 values, 12 variable parameters for Dy2Si2Mg. The samarium compound shows a small homogeneity range Sm2+xSi2Mg1−x. The investigated single crystal had the refined composition Sm2.022(3)Si2Mg0.978(3). The RE2Si2Mg silicides are 1:1 intergrowth structures of CsCl and AlB2 related slabs of compositions REMg and RESi2. Crystals of the binary silicide Dy5Si3 were obtained as side product. The structure was refined from X-ray single crystal data: Mn5Si3 type, P63/mcm, a = 841.0(2), c = 631.3(1) pm, wR2 = 0.0661, 269 F2 values, 12 variable parameters.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
