Alkali, Archerite, Chalcogen, Pnictogen

• H-K-O-P
• Cl-H-K-O-P
• H-K-O-P-S
• H-K-Na-O-P
• electronic and electrical properties
• structural properties
• optical properties
• mechanical properties
• permittivity (dielectric constant)
• alkali
• pnictogen
• chalcogen
• archerite
• orthophosphate
• tetragonal
• cubic
• orthorhombic