MS15-P05 Structural diversity of terrestrial phosphides related to Fe-Ni-P systemThe recent findings of terrestrial phosphides related to Fe-Ni-P triangle (Table 1) substantially expand our knowledge on this important cosmochemical system. We herein provide comparative crystal chemical characteristics of terrestrial phosphides vs. their counterparts of space origin. Crystal structures of some of the listed minerals are studied by both single crystal and powder X-ray diffraction. Special attention has been paid to the distribution of iron and nickel in their structures. The possibility of X-ray diffraction approach, involving anomalous scattering of CoKα-radiation at the Fe-K edge, is discussed.
Table 1. Natural phosphides in the Fe-Ni-P system
* The names of new phosphide minerals are highlighted by italic.
This study was carried out under financial support of Russian Scientific Foundation, grant no. 18-17-00079. The authors thank the Center for X-ray Diffraction Studies and Geomodel Center of Saint-Petersburg State University for instrumental and computational support.
Keywords: phosphides, crystal structure, mineral