Lu₂SiO₅by single-crystal X-ray and neutron diffraction

Abstract

The structure of dilutetium silicon pentaoxide, Lu2SiO5, has isolated ionic SiO4 tetrahedral units and non‐Si‐bonded O atoms in distorted OLu4 tetrahedra. The OLu4 tetrahedra form edge‐sharing infinite chains and double O2Lu6 tetrahedra along the c axis. The edge‐sharing chains are connected to the O2Lu6 double tetrahedra by isolated SiO4 units. The structure has been determined by neutron diffraction.

The effect of co-doping on the growth stability and scintillation properties of lutetium oxyorthosilicate

“…When the dopant involved is one that reduces the surface tension, as in the case of Ca in LSO, the surface tension will therefore become progressively lower as the growth run continues. This may enhance the tendency of the monoclinic LSO structure [14] to follow a preferred growth direction, leading to off-axis growth, and may explain why the cone portion of the high calcium boules grew relatively normally, with acentric growth commencing only after the boule was partially complete and solid-liquid segregation increased the calcium concentration in the melt. Others have suggested that under these conditions there may be concentration gradient-driven Marangoni flow in the region of the meniscus [15].…”

Formation and characterization of Lu silicate nanoparticles in amorphous SiO2

“…Significant changes occurred after treatment at 1000 • C. There is, however, interesting difference in the spectra of the sample treated at 950 • C for 40 h and then at 1000 • C for 3 h, and the sample treated at 1000 • C for 3 h. The former exhibits strong band at 829 cm −1 and resembles closely that of C-Lu 2 Si 2 O 7 , while the latter exhibits very sharp and strong band at 878. 6 supported by XRD and FT-IR data, indicate that mechanism of formation of both silicates is different. Prolonged annealing at 1000 • C for 12 h resulted in disappearance of the oxide phase.…”

“…For 1:1 composition (orthosilicate-Lu 2 O[SiO 4 ]) A-and B-types were observed [4][5][6]. Very rich crystallochemistry occurs for 1:2 composition (disilicate-Lu 2 Si 2 O 7 ), where five different structures: B [7], C [4,8], D [9], L [10] and X [9,11] were discovered.…”

Growth and Characterization of Ytterbium Doped Silicate Crystals for Ultra-Fast Laser Applications

“…The structure of monoclinic LSO crystal with isolated ionic SiO 4 tetrahedral units and non-Si-bonded O atoms in distorted OLu 4 tetrahedron were determined by neutron diffraction (Gustafsson et al, 2001 …”