ASb₂(SO₄)₂(PO₄) (A = H₃O⁺, K, Rb): Layered Structure Containing Ordered Sulfate and Phosphate Anions

Abstract

Three compounds ASb2(SO4)2(PO4) (A = H3O+, K, Rb) were obtained from the reactions of Sb2O3, A2CO3 (A = Li, Rb) or K2SO4 and NH4H2PO4 in H2SO4 (98 %) at 220–250 °C. Their structures were determined by single‐crystal X‐ray diffraction. All compounds crystallize in the triclinic space group P$\bar{1}$ (no.2) and are isostructural. The crystal structures consist of two‐dimensional 2∞[Sb2(SO4)2(PO4)]– anionic layers and alkali cations, which are located between anionic layers. The anionic layers are composed of [SbO4] ψ‐trigonal bipyramids, [SbO5] ψ octahedra, [SO4] tetrahedra, and [PO4] tetrahedra. All compounds are characterized by solid state UV/Vis/NIR diffuse reflectance spectra, FT‐IR spectroscopy, and Raman spectroscopy.

Synthesis, Crystal Structures, and Thermal Analyses of Two New Antimony Tellurite Sulfates: [Sb2(TeO4)](SO4) and [Sb2(TeO3)2](SO4)

“…As some of literature reported, Infrared bands observed above 800 cm −1 can be assigned to SO 4 2− vibrations mode. The bands at 1136, 1100, 1010, 960, 815 cm −1 in the Raman spectrum and peak at 1110, 1030, 920 cm −1 in the infrared spectrum could be assigned to asymmetric stretching mode of SO 4 2− anions and S−O symmetric stretching vibrations [44] . The region between 800 and 700 cm −1 relates to the stretching vibrations of the Te−O bonds, like 723/750 cm −1 , as is observed in some compounds such as (Te 2 O 3 )SO 4 (770, 720 cm −1 ), and TeO 2 (780 cm −1 ) [45] .…”

“…The bands at 1136, 1100, 1010, 960, 815 cm À 1 in the Raman spectrum and peak at 1110, 1030, 920 cm À 1 in the infrared spectrum could be assigned to asymmetric stretching mode of SO 4 2À anions and SÀ O symmetric stretching vibrations. [44] The region between 800 and 700 cm À 1 relates to the stretching vibrations of the TeÀ O bonds, like 723/750 cm À 1 , as is observed in some compounds such as (Te 2 O 3 )SO 4 (770, 720 cm À 1 ), and TeO 2 (780 cm À 1 ). [45] In the Raman spectra, bands at 772, 753 cm À 1 can attribute to TeÀ O symmetric and asymmetric stretching vibrations, respectively.…”

Ba3Sb2(PO4)4 and Cd3Sb2(PO4)4(H2O)2: Two New Antimonous Phosphates with Distinct [Sb(PO4)2] Structure Types and Enhanced Birefringence

“…42 On the basis of the literature, it showed that the metal ions of the reported antimonous phosphates were concentrated in alkali ions, like K + , Na + , and Cs + . 43,44 No d 10 -TM antimonous phosphates have been reported, and alkali earth compounds are also rare.…”

“…It is worth mentioning that the antimonous phosphate framework with Sb/P = 1/2 is very rare. [42][43][44]51 The Sb/P ratios of most known antimonous phosphates are larger than or equal to 1, such as KSb 2 (SO 4 ) 2 (PO 4 ), 44 Sb 5 O 6 (PO 4 ), 51 and Sb(PO 4 ). 52 Only the newly reported NLO material of K 2 Sb(P 2 O 7 )F 42 belongs to the phosphorus-rich compounds.…”

Hybrid Inorganic‐Organic Frameworks: Synthesis and Crystal Structures of RbFe(SO4)(C2O4)0.5·H2O and CsM(SO4)(C2O4)0.5·H2O (M = Mn, Fe)

“…The infrared spectra of RbFe(SO 4 )(C 2 O 4 ) 0.5 · H 2 O, CsMn(SO 4 )(C 2 O 4 ) 0.5 · H 2 O, and CsFe(SO 4 )(C 2 O 4 ) 0.5 · H 2 O are shown in Figure . The infrared peaks observed at 620, 1090, 1174, and 1331 cm –1 [RbFe(SO 4 )(C 2 O 4 ) 0.5 · H 2 O], 619, 1078, 1168, and 1323 cm –1 [CsMn(SO 4 )(C 2 O 4 ) 0.5 · H 2 O], 625, 1095, 1174, and 1322 cm –1 [CsFe(SO 4 )(C 2 O 4 ) 0.5 · H 2 O] are assigned to the ν 4 , ν 1 , and ν 3 modes of the sulfate tetrahedra . The bands at 455, 445, 458, 508, 511, and 509 cm –1 can be attributed to symmetric SO 4 2– bending modes ν 2 , and the peak positions for the three compounds are very similar.…”