Crystal structure of Yal3[BO3]4

Energy levels and crystal-field analysis of Tm3+ in YAl3(BO3)4 crystals

“…YAB belongs to the trigonal system with space group R32. The lattice constants are a¼b¼9.293Å and c¼7.245Å, Z¼3 [15]. Tm 3 þ replaces Y 3 þ in sites with six fold oxygen coordination and trigonal geometry with D 3 point symmetry.…”

Luminescence properties of YAl3(BO3)4:Gd3+ phosphors substituted with Sc3+ ions

“…It is known that GdAl 3 (BO 3 ) 4 crystal has two polymorphs [6]. The low-temperature phase crystallizes in the same rhombohedral system as YAl 3 (BO 3 ) 4 crystal.…”

Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals

“…In the unified model [21] several possibilities of the polytypic packing were predicted. Among them YAB, NAB and GAB crystals with R32, C2/c and C2 symmetry respectively have been prepared under different growth conditions [7,8,22].…”