Two Ce(SO4)2·4H2O polymorphs: Crystal structure and thermal behavior

Luminescence studies of decomposition of ceric sulfate

“…Three polymorphic forms of Ce(SO 4 ) 2 ·4H 2 O have been structurally characterized: two orthorhombic modifications, reported by Casaria and Langer (8), and one monoclinic (space group C2/c), discussed by Filipenko et al . (9).…”

“…Three polymorphic forms of Ce(SO4)2·4H2O have been structurally characterized: two orthorhombic modifications, reported by Casaria and Langer (8), and one monoclinic (space group C2/c), discussed by Filipenko et al (9). The two orthorhombic modifications are called the a-form (I) and the b-form (II) and they crystallize in space groups Fddd and Pnma, respectively.…”

“…(7) propose that the dehydration of Ce(SO 4 ) 2 ·4H 2 O occurs between 75°C and 500°C and that the initial decomposition temperature is around 600°C. A recent paper by Casaria and Langer (8) shows that there can be still more complications, as Ce(SO 4 ) 2 ·4H 2 O can exist in two crystallographic modifications, viz. α (space group F ddd ) and β (space group P nma ) varieties, both belonging to the orthorhombic system, in addition to the well‐known monoclinic phase (space group C2/c) (9).…”

Oxysulfate/oxysulfide of Tb3+ obtained by thermal decomposition of terbium sulfate hydrates under different atmospheres

“…These compounds are often used in nanotechnology [1][2][3][4][5], also as luminescent materials [6,7], semiconductors [8], X-ray spectroscopic probes and gas absorbing agents [9][10][11][12]. These compounds can exist in various stable forms such as lanthanum oxydisulfide Ln 2 OS 2 , dioxysulfide Ln 2 O 2 S, oxydisulfate Ln 2 O(SO 4 ) 2 and dioxysulfate Ln 2 O 2 SO 4 , as well as lanthanum oxide Ln 2 O 3 [1,2,4,[13][14][15]. These varieties of products can be achieved because of the ability of sulfonate anion to organize as a mono-, bi-and tridentate ligand around the metal ion.…”

Synthesis, characterization and thermal stability of a crystalline niobium oxysulfate

“…There are many valuable applications of metal oxysulfates in modern science and technology, for instance, the efficient catalysts, optical properties, semiconductors, dopants of phosphorescent materials, oxygen storage materials, reinforcing agents and flame retardant products, etc. [1][2][3][4][5][6][7][8][9][10][11][12].…”