Crystal structures of Ca_4+x Y_3-x Si₇O_15+x N_5-x (0 ≤ x ≤ 1) comprising of an isolated [Si₇(O,N)₁₉] unit.

ABSTRACT: Single crystals of the solid solution series Ca_4+x Y_3-x Si₇O_15+x N_5-x were obtained by a solid-state reaction method using a flux for x = 0, 0.5 and 1, resulting in Ca₄Y₃Si₇O₁₅N₅ (tetra-calcium triyttrium hepta-silicon oxynitride), Ca_4.5Y_2.5Si₇O_15.5N_4.5 and Ca₅Y₂Si₇O₁₆N₄ (penta-calcium diyttrium hepta-silicon oxynitride). Single-crystal X-ray analysis revealed that the three compounds are isotypic and belong to space-group type P6₃/m. Ca²⁺ and Y³⁺ cations are distributed over two crystallograp

SUBMITTER: Kobayashi M 

PROVIDER: S-EPMC6362659 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature