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H-K-O-P-Sn-W
Bi-H-K-O-V-W
H-K-Mo-Na-O-S-V
H-K-O-Rb-Ru-Si-W
Fe-H-K-Mo-Na-O-S-V
structural properties
chalcogen
transitional
multinary
alkali
hydrate
monoclinic
tetragonal
triclinic
orthorhombic