The new ternary phosphides SrNi9P5 and BaNi10P6 were synthesized by heating the elements at 900°–1100°C. Single crystal X-ray methods revealed that SrNi9P5 is isotypic with BaNi9P5 and crystallizes hexagonally [P63/mmc; Z = 2; a = 6.529(1) Å, c = 10.732(1) Å], whereas BaNi10P6 forms a new structure with orthorhombic symmetry [Cmca, Z = 4; a = 6.449(1) Å, b = 16.191(1) Å, c = 8.784(1) Å]. The structures are best described as an arrangement of alkaline-earth metal atoms, which are surrounded by Ni18P12(SrNi9P5) and Ni14P12 cages (BaNi10P6), respectively.
Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.