Crystal data for Lu₂Si₂O₇

Abstract

Lutetium pyrosilicate single crystals Lu2Si2O7 were grown by a floating‐zone technique associated with an arc image furnace. The compound is monoclinic, space group C2/m, Z = 2, a = 6.7665 (14), b = 8.8407 (18), c = 4.7195 (27) Å and β = 101.95 (3)°. Indexed X‐ray powder data at 294 K are given.

Cerium concentration and temperature dependence of the luminescence of Lu2Si2O7:Ce scintillator

“…The phenomenon means that the doping concentration under 0.75% should be preferred. Considering that there is only one single crystallographic site for lutetium ions [2] and ions radius of Lu 3+ in LPS is much smaller than that of Ce 3+ (Ce 3+ :1.034Å, Lu 3+ :0.848Å) [18], this is a reasonable phenomenon. Fig.…”

“…As the temperature increases, the 5d electrons of Ce 3+ will be thermalized into conduction band [20]. Now that the energy level position of 5d (2) sublevel is higher than that of 5d(1) sublevel, the electron on 5d(2) sublevel will firstly thermalize into conduction band when temperature increases. Those thermalized 5d electrons will not give the 5d-4f Ce 3+ emission, leading to the decrease of excitation intensity of peak 1 and the ratio between the two peaks.…”

“…So it is a good candidate scintillator used for the X-ray and ␥-ray detection devices due to its outstanding scintillation and physical performance. LPS has the thortveitite structure, with monoclinic symmetry, space group C2/m and only one single crystallographic site for lutetium ions [2]. The LPS:Ce scintillator can be used for oil-well logging because of its high temperature light yield (up to 450 K) [3].…”

Comparison of optical properties between ytterbium-doped Lu2SiO5 (Yb:LSO) and ytterbium-doped Lu2Si2O7 (Yb:LPS) laser crystals

“…1 shows the powder XRD patterns for the as-grown crystals. Their diagrams were compared to literature data [10,11]. It demonstrated that the symmetry of the Yb:LPS (Fig.…”

Czochralski growth and physical properties of cerium-doped lutetium pyrosilicate scintillators Ce3+:Lu2Si2O7

“…It melts congruently at about 1900 1C and crystallizes in a monoclinic structure, with the space group C2/m (n112) [4]. The structure may be considered as a distorted hexagonal packing of oxygens containing the lutetium atoms in octahedral sites, and the silicon ions in tetrahedral ones, in alternating layers [5].…”