Crystal growth of the high-pressure phase of Mg2Sn

Phase relations in the Mg2SnSn system were studied by differential thermal analysis at a pressure of 5.8 GPa and temperatures up to 1100 °C. A schematic p, T diagram for Mg2Sn is presented. Single crystals of the high-pressure phase of Mg2Sn were obtained by growth from a molten solution under high pressure. Crystal data for Mg2Sn II were determined using a Buerger precession X-ray camera. The phase Mg2Sn II crystallizes with hexagonal unit cell, a = 13.19 ± 0.01 Å, c = 13.28 ± 0.01 Å, c/a = 1.006, Dm = 4.1 ± 0.2 g cm−3, z = 30, Dc = 4.17 g cm−3, space group P3c1 (no. 158) or P3c1 (no. 163).