Structure-property relationship for complex-substituted molybdates and tungstates of the scheelite family

Alkali metal impact on structural and phonon properties of Er3+ and Tm3+ co-doped MY(WO4)2 (M = Li, Na, K) nanocrystals

“…S1b † ) shows that all XRD patterns measured for our nanocrystalline samples correspond well to the pattern of the reference tetragonal NaY(WO 4 ) 2 with the unit cell parameters a = b = 5.205, c = 11.282 Å, and V = 305.6 Å 3 ( I 4 1 / a , ICSD #192112). 21,22 According to literature data, NaY(WO 4 ) 2 does not exhibit any phase transition below its melting temperature (1483 K). 23 As this compound is a laser host crystal, several papers were devoted to properties of the samples doped with various ions (see ref.…”

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (NaxGd1−x)MoO4crystals

“…In Fig. 4, a triangle is shown describing three areas of existence of phases with the general composition (Na,Gd,ψ)MoO 4 : area I: NGM-I, NGM-A, NGM-Ar and phases with ψ = Yb (NGM:5%Yb & NGM:1.5%Yb, NGM:1.8%Yb & NGM:4%Yb 14 ); area II: phases with ψ = La 14,31 with space group I4 1 /a; area III: contains the defective phases with ψ = ▯ (with modulated structure, 18 without modulation 19 and NGM-2/7 and NGM-6/15 with space group I4 1 /a) and phase NGM:10%Yb with space group P4 ¯.2…”

Structural perfection of (Na0.5Gd0.5)MoO4:Yb laser crystals

“…This means that the majority of unit cells which form the structure of microcrystals are described within the framework of space group I4 1 /a. Reflections that do not obey the extinction rules of space group I4 1 /a have been previously revealed for double molybdates and tungstates [9,13,14,31].…”

“…4b). This may indicate the formation of domains with different symmetries and unit cells of different sizes, the revealed reflections between reciprocal-lattice points [31].…”