Inorganic Chemistry, Vol.54, No.15, 7433-7437, 2015
High-Pressure Synthesis and Electronic Structure of a New Superconducting Strontium Germanide (SrGe3) Containing Ge-2 Dumbbells
We obtained a new strontium germanide (SrGe3) by high-pressure and high-temperature synthesis. It was prepared at 13 GPa and 1100 degrees C. The space group and cell constants are I4/mmm (No. 139), a = 7.7800(8) angstrom, c = 12.0561(13) angstrom, and V = 729.74(17) angstrom(3). SrGe3 crystallizes in the CaSi3 structure composed of Ge-Ge dumbbells and Sr2+ ions. SrGe3 is a type II superconductor with a transition temperature of 6.0 K.