Kasprowicz

• K-O-W-Y
• Er-Gd-Ho-K-O-W-Yb
• Gd-Ho-K-O-Tm-W-Yb
• Er-Gd-K-O-Tm-W-Yb
• Er-Gd-K-O-W-Yb
• mechanical properties
• structural properties
• sound velocity
• transverse sound velocity
• optical properties
• chalcogen
• transitional
• rare earth
• alkali
• lanthanoid
• monoclinic
• orthorhombic