Synthesis and Luminescence Properties of Amber Emitting La Sr[Si N O ] : Eu and Syntheses of the Substitutional Variants RE AE [Si N O ] : Eu with RE=La, Ce; AE=Ca, Sr, Ba; 0≤x≤2.

The oxonitridosilicate La Sr[Si N O ] : Eu and its substitutional variants RE AE [Si N O ] : Eu with RE=La, Ce; AE=Ca, Sr, Ba and 0≤x≤2 were synthesized starting from REN, SrN/Ca N /Ba N, SiO , amorphous Si N and Eu O as doping agent at 1600 °C in a radiofrequency furnace. The crystal structure of La Sr[Si N O ] was solved and refined based on single-crystal X-ray diffraction data. La Sr[Si N O ] crystallizes in the orthorhombic space group Pmn2 (no.

Missing Member in the M M Si N Compound Class: Carbothermal Reduction and Nitridation Synthesis Reveal Substitution of Nitrogen by Carbon and Oxygen in CaLu[Si N C O ]:Eu /Ce (x≈0.3).

The nitridosilicate CaLu[Si N C O ] (x≈0.3) was synthesized by carbothermal reduction and nitridation starting from CaH , Lu O , graphite and amorphous Si N at 1550 °C in a radiofrequency furnace. CaLu[Si N C O ] (x≈0.

Structure Elucidation of Complex Endotaxially Intergrown Lanthanum Barium Oxonitridosilicate Oxides by Combination of Microfocused Synchrotron Radiation and Transmission Electron Microscopy.

Single-crystalline domains in intergrown microcrystalline material of the new compounds Ba La [Si N O ]O :Ce and Ba La [Si N O ]O :Ce were identified by transmission electron microscopy (TEM). Precise diffraction data from these domains were collected with microfocused synchrotron radiation so that crystal structure elucidation of the complex disordered networks became possible. They are composed of two different interconnected slabs of which one is similar in both compounds, which explains their notorious intergrowth.

Flux synthesis, crystal structures, and physical properties of new lanthanum vanadium oxyselenides.

The new lanthanum vanadium oxyselenides LaVSeO, LaVSeO, LaVSeO, LaVSeO, and LaVSeO were synthesized in eutectic NaI/KI fluxes, and their crystal structures were determined using single-crystal and powder X-ray diffraction experiments. LaVSeO and LaVSeO adopt known structure types, whereas LaVSeO, LaVSeO, and LaVSeO crystallize in hitherto unknown structure types. The main building blocks of these compounds are chains of edge-sharing VSe, VSeO, and/or VSeO octahedra, linked together by edge-sharing OLa and/or OLaV tetrahedra forming fluorite-like ribbons.