Abstract A new hybrid salt [4-apyH][Cr(dipic) 2 ]·3H 2 O ( 1 ) ([4-apyH] + = [C 5 H 7 N 2 ] + = 4-aminopyridinium cation, dipic 2− = dipicolinato(2−) ligand) has been synthesized and characterized by elemental and thermal analyses, FT-IR and UV/Vis spectroscopies, EPR, single-crystal and powder X-ray diffraction. Salt 1 consists of one [Cr(dipic) 2 ] − complex anion, one 4-aminopyridinium [4-apyH] + counter ion, and three water molecules of crystallization. Each Cr(III) center in the anionic complex exhibits a distorted octahedral coordination. The crystal structure of 1 features alternating layers of organic cations and complex anions. The packing within the structure is stabilized by hydrogen bonds, including O–H⋯O and N–H⋯O interactions, which connect water molecules, anionic complexes, and cationic entities. The thermogravimetric diagram shows two main weight losses, corresponding to the removal of water molecules and the decomposition of the framework, respectively. The molar conductivity Ʌ m = 129 S cm 2 mol −1 confirms the 1:1 electrolyte nature of salt 1 in water. The EPR spectrum is consistent with Cr 3+ ions in an octahedral environment. The antimicrobial activity of salt 1 has been evaluated in vitro against four pathogenic microorganisms, including three bacteria and one yeast. The results showed significant antibacterial activity against Helicobacter pylori PMSS and antifungal activity against Candida albicans N50 .
Abstract The platinides Nd 5 Sn 9 Pt 7 and Gd 5 Sn 9 Pt 7 were synthesized by arc-melting of the elements and subsequent annealing. Nd 5 Sn 9 Pt 7 ( a = 437.43(6) pm, b = 2872.2(4) pm, c = 727.8(1) pm) and Gd 5 Sn 9 Pt 7 ( a = 428.37(8) pm, b = 2869.7(5) pm, c = 720.4(1) pm) crystallize with the non-centrosymmetric Zr 5 Pd 9 P 7 -type structure, orthorhombic space group Amm 2. The structure of the gadolinium compound was refined from single-crystal X-ray diffractometer data. Refinements of the occupancy parameters revealed the formation of tiny defects on four Wyckoff sites, leading to composition Gd 4.95(1) Sn 8.94(1) Pt 6.89(2) for the studied crystal. The tin and platinum atoms build up a three-dimensional [Sn 9 Pt 7 ] δ − polyanionic network with pronounced Sn–Pt bonding (264–289 pm). The Sn3 atoms show formation of a Sn3–Sn3 dumb-bell with a distance of 320 pm. The three crystallographically independent gadolinium atoms are located within distorted pentagonal prismatic channels. They are coordinated by the platinum and tin atoms: Gd1@Pt 6 Sn 8 , Gd2@Pt 5 Sn 8 and Gd3@Pt 5 Sn 8 . Temperature-dependent magnetic susceptibility studies show Curie-Weiss paramagnetism for Gd 5 Sn 9 Pt 7 and an experimental magnetic moment of 8.12(1) µ B per Gd atom, compatible with stable trivalent gadolinium. Gd 5 Sn 9 Pt 7 is ordered antiferromagnetically below a Néel temperature of T N = 15.6(1) K.
Abstract Polycrystalline samples of the germanides RE 2 Rh 3 Ge with RE = La, Nd, Sm, Gd, Dy, Ho, Tm, Yb and Lu were synthesized from the elements by arc-melting or within sealed niobium ampoules followed by annealing in order to increase phase purity and crystallinity. The germanides with RE = La, Nd, Dy, Tm, Yb and Lu are reported here for the first time. The samples were characterized by X-ray powder diffraction. They are ternary ordered Laves phases and crystallize with the rhombohedrally distorted variant of the Mg 2 Ni 3 Si type, space group R 3 ̅ $̅{3}$ m . In addition, the solid solutions Gd 2 Rh 3 Ge 1– x Ga x were studied and the structure of Gd 2 Rh 3 Ge 0.5 Ga 0.5 was refined from single-crystal X-ray diffractometer data: a = 558.34(9), c = 1,187.9(2) pm, w R 2 = 0.0350, 174 F 2 values and 11 variables. The rhombohedral distortion is caused by the rhodium-for-germanium (gallium) substitution within the network of condensed tetrahedra and avoids too short RE – RE distances. The RE 2 Rh 3 Ge germanides were studied with respect to their magnetic properties. La 2 Rh 3 Ge and Lu 2 Rh 3 Ge carry no permanent magnetic moments and behave as Pauli paramagnets. The other compounds are Curie-Weiss paramagnets with stable trivalent ground states. They are ordered ferromagnetically below Curie temperatures of 12.2(1) K (Nd), 57.6(1) K (Sm), 63.1(1) K (Gd), 22.3(1) K (Dy), 13.8(1) K (Ho) and 9.0(1) K (Tm). The 2 K magnetization isotherms classify these RE 2 Rh 3 Ge germanides as soft ferromagnets which show a tendency to saturation already at around 10 kOe. A switch in the magnetic ground state occurs for the solid solutions Gd 2 Rh 3 Ge 1– x Ga x , from antiferromagnetic Gd 2 Rh 3 Ga ( T N = 44.5(1) K) to ferromagnetic Gd 2 Rh 3 Ge with T C = 63.1(1) K with a monotonous increase of the magnetic ordering temperature.
Abstract A new nickel(II) complex, {[Ni(IDB) 2 ]SO 4 } 2 , was synthesized in aqueous DMF at 90 °C using bis(benzimidazole-2-ylmethyl)amine (IDB) as ligand for NiSO 4 ·6H 2 O. Single-crystal X-ray diffraction analysis indicated that the complex has a mononuclear structure and can self-assemble into a one-dimensional supramolecular substructure through hydrogen bonding. Hirshfeld surface analysis verified the dominant non-covalent interaction mode in the complex. Gassy carbon electrodes (Ni/GCE) modified with the complex were characterized using cyclic voltammetry, and the electrochemical detection performance for two anions [dichromate (Cr 2 O 7 2− ) and nitrite (NO 2 − )] was systematically studied using chronoamperometry. Experimental results indicate that in 0.2 m H 2 SO 4 , the Ni/GCE exhibits a linear response to Cr 2 O 7 2− in the range of 0.5 μm–4 mm, with a detection limit of 0.17 μm; in the 0.2 m phosphate buffer salin (PBS), the Ni/GCE shows a good current response to NO 2 − , with a range of 0.5 μm–4 mm and a detection limit of 0.32 μm. Furthermore, the Ni/GCE demonstrated high accuracy in real sample detection, with spiked recoveries of Cr 2 O 7 2− and NO 2 − ranging from 97.7 % to 99.3 % and 98.0 % to 99.3 %, respectively. This study opens a new door for the use of Ni(II) complexes as dual-function anion electrochemical sensors.
The rare earth metal(III) oxotellurates(IV) RE 2 Te 3 O 9 ( RE = Y, Sm–Tb, Ho and Er) could be synthesized through solid-state reactions at temperatures near 850 °C from mixtures of the oxides RE 2 O 3 and TeO 2 in a 1 : 3 M ratio with cesium bromide (CsBr) as fluxing agent. They crystallize in the monoclinic space group P 2 1 / c , thus being isostructural to the already known B -type Dy 2 Te 3 O 9 with unit cells and molar volumes decreasing monotonously from Sm 2 Te 3 O 9 ( a = 1389.81(9) pm, b = 545.14(3) pm, c = 2304.97(14) pm, β = 98.942(3)°) to Er 2 Te 3 O 9 ( a = 1365.71(9) pm, b = 535.48(3) pm, c = 2261.04(14) pm, β = 99.053(3)°) according to the lanthanoid contraction. The crystal structure contains four crystallographically independent RE 3+ cations, which are hepta- or octacoordinated by oxygen atoms. Three types of rare earth metal-oxygen polyhedra [( RE 1– RE 3)O 8 ] 13− form two types of zigzag chains by edge-sharing running along [010], which are further connected with each other via common edges to layers spreading out parallel to (100). The remaining [( RE 4)O 7 ] 11− polyhedron is attached to a layer above and below via common edges generating corrugated R E 4 O 17 22 − ∞ 2 ${}_{\infty }{}^{2}\left\{{\left[{RE}_{4}{\mathrm{O}}_{17}\right]}^{22-}\right\}$ sheets parallel to the (100) plane. For the oxotellurate(IV) partial structure, the six crystallographically different Te 4+ cations in ψ 1 -tetrahedral [TeO 3 ] 2– units are linked through strong secondary Te 4+ ···O 2− contacts to form screw-like Te 5 O 15 10 − ∞ 1 ${}_{\infty }{}^{1}\left\{{\left[{\text{Te}}_{5}{\mathrm{O}}_{15}\right]}^{10-}\right\}$ strands propagating along the [010] direction with 2 1 screw axes running through their centres. The Raman spectra of all B -type RE 2 Te 3 O 9 members are reported and discussed, and the orientation of the lone pairs at the Te 4+ cations is defined.
The rare earth-rich intermetallic cadmium compounds RE 14 Ni 3 Cd 3 ( RE = Dy–Tm, Lu) were synthesized by induction melting of the elements in sealed tantalum ampoules, followed by annealing in sealed quartz tubes in muffle furnaces. The polycrystalline samples were characterized by powder X-ray diffraction, confirming isotypism with Gd 14 Co 3 In 2.7 , space group P 4 2 / nmc . The structures of the holmium and lutetium compound were refined from single-crystal X-ray diffractometer data: a = 945.03(3), c = 2,275.64(7) pm, w R 2 = 0.0316, 2800 F 2 values, 64 variables for Ho 14 Ni 3.70(1) Cd 2.27(1) and a = 929.79(3), c = 2,237.53(6) pm, w R 2 = 0.0537, 1315 F 2 values, 63 variables for Lu 14 Ni 3.69(3) Cd 2.31 . The striking structural feature of these cadmium phases is the formation of small defects on one 8 g nickel site and Cd/Ni mixing on the Wyckoff position 4 c . The complete RE 14 Ni 3 Cd 3 structures can be described by a condensation of tricapped trigonal prisms around the nickel and icosahedra around the cadmium atoms. Temperature dependent magnetic susceptibility studies have revealed Curie-Weiss paramagnetism for Ho 14 Ni 3 Cd 3 , Er 14 Ni 3 Cd 3 and Tm 14 Ni 3 Cd 3 with antiferromagnetic transitions in the low-temperature regime ( T N = 13.1(1), 8.6(1) and 3.6(1) K for RE = Ho, Er and Tm, respectively).
The complexes [Co(ima)(2)(nba)(2)(H2O)(2)] (1) and [Co(Hima)(2)(bta)(H2O)(2)] (2) have been synthesized and characterized by single-crystal X-ray diffraction and IR spectroscopy (ima = 4-(1H-imidazol-1-yl)aniline, Hnba = 4-nitrobenzoic acid, H(4)bta = benzene-1,2,4,5-tetracarboxylic acid). Complex 1 has a mononuclear structure while complex 2 exhibits a multinuclear chain structure. These components are further extended to afford kgd sheets for 1 and a three-dimensional fsc network for 2, with the aid of abundant hydrogen-bonding interactions. The structural diversity indicates that the carboxylate ligands induce a change in the protonation state of the ima ligand in the two complexes, thereby playing a critical role in the increase of the dimensionality of the supramolecular substructures from 2D in 1 to 3D in 2.
This study aims to evaluate the physicochemical properties of local coal fly ash (CFA) as a secondary cementitious material (SCM) with a focus on improving the strength activity index (SAI) on final mortar strength. Ordinary Portland cement (OPC) was partially replaced with CFA, i.e. 5-30 % by weight and mixed with sand and water to form mortar and tested for setting time, consistency, workability, heat of hydration and compressive strength, focusing on the strength activity index for 3, 7 and 28 days under standard conditions. The investigations revealed that both initial and final setting times and workability of CFA-blended OPC increase, which is beneficial for desirable construction applications. However, the consistency decreases slightly, which could be due to the decrease in demand of water for hydrated mortar. The initial and final hydration temperature of CFA-blended OPC decreases, whereas the time to reach maximum hydration temperature increases. The results showed that after 28 days of curing, OPC blends with CFA improve the compressive strength of the mortar. This highlights the effective reutilization of local CFA as a low-cost and viable SCM with enhanced compressive strength. The formulation allows to develop construction materials with improved properties and also to mitigate environmental problems due to coal burning.
Mixtures of aqueous solutions of 2-methylimidazole and oxalic acid, in molar ratios of 1:2 and 2:1, were investigated, leading to the isolation of two 2-methyl-1H-imidazol-3-ium (2-methylimidazolium) oxalate salts. Compound [C4H7N2][0.5C2O4][H2C2O4][H2O] (1) was isolated as a co-product in the presence of trimethyltin chloride, whereas [(C4H7N2)2][C2O4] (2) was obtained directly from the aqueous reaction. Both compounds were characterized by FT-IR spectroscopy, Hirshfeld surface analysis, elemental analysis and single-crystal X-ray diffraction. Salt 1 crystallizes in the monoclinic system, space group C2/c, with unit cell parameters a = 24.682(4), b = 3.7589(7), c = 22.829(4) & Aring;, beta = 113.486(4)degrees, V = 1,942.5(6) & Aring;3 and Z = 8. The four components of 1, 2-methylimidazolium cations, oxalate anions, oxalic acid and water are connected through intermolecular hydrogen bonds. Salt 2 crystallizes in the orthorhombic system, space group Pbca, with a = 13.9808(9), b = 13.3039(10), c = 19.6563(13) & Aring;, V = 3,656.1(4) & Aring;3 and Z = 12. Two 2-methylimidazolium cations compensate for the two negative charges of an oxalate anion. The packing of the building units in the two salts features the propagation of a three-dimensional network in 1, whereas in 2 it is restricted to a layered arrangement.
The compound Cr 51 Ni 23 B 168 O 337 (OH) 29 has been obtained through an explorative high-pressure/high-temperature experiment at 9 GPa and 1,200 °C. This borate crystallizes in the trigonal space group R 3 ‾ m $R\overline{3}m$ with the unit cell parameters a = 10.4387(1), c = 51.5121(1) Å, V = 4,861.1(2) Å 3 , and one formula unit per cell. The crystal structure is a complex framework, composed of corner-sharing tetrahedral [BO 4 ] groups and edge-sharing [(Cr,Ni)O 6 ] octahedra. In this contribution, the structural data and the infrared spectrum of Cr 51 Ni 23 B 168 O 337 (OH) 29 are presented.
The interaction of components in the system DyNiIn-DyNiSn was studied by powder X-ray diffraction and scanning electron microscopy in the full concentration range at T = 870 K. The limited solubility of the p-elements in the parent compounds of equiatomic composition with the formation of substitutional solid solutions with the following compositions was established: DyNiIn1.0–0.5Sn0–0.5 (ZrNiAl-type structure; hexagonal space group P 6 ‾ $\overline{6}$ 2m; а = 0.74480(9)–0.74323(6); с = 0.37811(5)–0.37635(4) nm) and DyNiSn1.0–0.8In0–0.2 (TiNiSi-type structure; orthorhombic space group Pnma; a = 0.711951(7)–0.71145(7); b = 0.44496(4)–0.44572(4); c = 0.76669(8)–0.76787(9) nm). Partial substitution of In by Sn atoms was confirmed by X-ray analysis of single crystals of the phases: DyNiIn0.7Sn0.3 (ZrNiAl-type structure; hexagonal space group P 6 ‾ $\overline{6}$ 2m; hP9, а = 0.74454(7); с = 0.37569(4) nm; V = 0.18036(3) nm3; R1 = 0.0203; wR2 = 0.0504) and DyNiIn0.1Sn0.9 (TiNiSi-type structure; orthorhombic space group Pnma; oP12, a = 0.71086(2); b = 0.44508(1); c = 0.76560(2) nm; V = 0.24223(1) nm3; R1 = 0.0233; wR2 = 0.0579). The existence ranges within the solid solutions and their structural features are briefly discussed.
CeNiZn and α-CePdZn (both ZrNiAl type, hexagonal space group P6‾2m) form a complete range of solid solutions CeNi1–x Pd x Zn. Samples were synthesized with steps of x = 0.1 or 0.05 from the pure elements by induction-melting. The structure of CeNi0.59(1)Pd0.41Zn was refined from single crystal X-ray diffractometer data: a = 727.61(8), c = 396.75(4) pm, wR2 = 0.0301, 297 F 2 values and 17 variables. Both the 1a and 2d transition metal sites show Ni/Pd mixing. The cell volume decreases from α-CePdZn to CeNiZn in a discontinuous manner. This is directly related to a change in the cerium magnetic ground state. The properties change from Curie-Weiss paramagnetic α-CePdZn to homogeneous mixed valence in CeNiZn. The magnetic susceptibility data of the intermediate-valence representatives could be fitted with the Sales-Wohlleben interconfiguration-fluctuation model.
The dimeric complex [{Cu( μ -I)( A )} 2 ] ( 1 2 ) has been isolated from the reaction of copper(I) iodide with the cyclic (alkyl)(amino)carbene (CAAC) containing a 1,1′-ferrocenylene (fc) backbone fc(CPh 2 –C–NMes) ( A , Mes = mesityl), whereas analogous reactions with conventional CAACs have exclusively afforded monomeric complexes [CuI(CAAC)]. The reaction of tetracarbonylnickel(0) with A furnished the dicarbonyl complex [Ni(CO) 2 ( A )] ( 2 ), whereas tricarbonyl complexes [Ni(CO) 3 (CAAC)] have always been obtained from analogous reactions with conventional CAACs. [{Cu( μ -I)( A )} 2 ] ( 1 2 ) and [Ni(CO) 2 ( A )] ( 2 ) have been structurally characterised by single-crystal X-ray diffraction.
Samples of YPdCd, Y 2 Pd 2 Cd and Y 2 Cu 2 Cd were synthesized from the elements by induction melting. The three cadmium phases were characterized through their Guinier powder patterns. YPdCd crystallizes with the hexagonal ZrNiAl-type structure (space group P 6 ‾ $\overline{6}$ 2 m ; a = 756.0(4) and c = 384.7(2) pm). The structure of Y 2 Pd 2 Cd was refined from single-crystal X-ray diffractometer data: Mo 2 B 2 Fe type, tetragonal space group P 4/ mbm , a = 765.33(3), c = 370.30(2) pm, w R 2 = 0.0254, 289 F 2 values and 12 variables. Y 2 Pd 2 Cd is a 1:1 intergrowth structure of CsCl and AlB 2 related slabs of compositions ‘YCd’ and ‘YPd 2 ’. The palladium dumb-bells (279 pm Pd–Pd) and the cadmium atoms (301 pm Cd–Pd) form a two-dimensional [Pd 2 Cd] substructure that is separated by yttrium layers in c direction. Consistent with their crystal structures, the 113 Cd solid-state MAS-NMR spectra of Y 2 Pd 2 Cd and isotypic Y 2 Cu 2 Cd show only one signal characterized by strong Knight shift contributions.
Explorative high-pressure/high-temperature syntheses (9 GPa, 1,200 °C) starting from NiO and H 3 BO 3 yielded a product mixture containing single crystals of NiB 6 O 8 (OH) 4 , a new orthorhombic borate (space group Fdd 2) with the lattice parameters a = 39.097(4) Å, b = 4.3880(4) Å, c = 7.5899(8) Å, V = 1,302.1(2) Å 3 , and eight formula units per cell. This compound is the third one in the structural class of borates with the general formula M (B 6 O 9– x )(OH) 3+ x ( M = In 3+ , Sc 3+ ( x = 0), Ni 2+ ( x = 1)). The reaction product has been studied by means of powder X-ray diffraction, and an infrared spectrum of a single crystal has been recorded. Results of BLBS and CHARDI calculations are presented.
The structurally related compounds with the empirical formulæ Li 11.2(1) Ba 2 Al 3.6(1) O 13 ( 1 ), Li 10.0(1) Ba 2 Al 4.0(1) O 13 ( 2 ), and Li 7.9(1) Ba 2 Al 4.7(1) O 13 ( 3 ) have been synthesized by conventional solid-state synthesis. The crystal structures were solved and refined in the trigonal space group P 3‾ m 1 (no. 164) with the chemical compositions derived from single-crystal X-ray diffraction data. The lattice parameters have been refined to a = 6.0399(1) Å, c = 10.1264(4) Å, V = 319.92(2) Å 3 for 1 , a = 6.0505(2) Å, c = 10.1272(4) Å, V = 321.07(2) Å 3 for 2 , and a = 6.0436(1) Å, c = 10.1762(3) Å, V = 321.89(2) Å 3 for 3 . A common structure with a three-dimensional tetrahedron substructure is constructed from (Li/Al)O 4 and AlO 4 tetrahedra, coined by edge-sharing T2 supertetrahedra and sechser -rings. Upon blue-light excitation ( λ exc = 448 nm), broad-band emissions are observed for the Eu 2+ -activated compounds with a peak wavelength of λ em ∼ 563 nm and a full width at half maximum of FWHM ∼ 141 nm (0.56 eV, 4,534 cm −1 ) for 1 , λ em ∼ 526 nm with a FWHM ∼ 98 nm (0.45 eV, 3,637 cm −1 ) for 2 , and λ em ∼ 549 nm with a FWHM ∼ 151 nm (0.63 eV, 5,052 cm −1 ) for 3 .
The presence of carbon dioxide in natural gas leads to reductions in the CH 4 calorific value and to corrosion of transportation pipelines, making it necessary for the CO 2 concentration to be reduced below 2 %. In this study, a porous organic polymer (POP) named BDA-TG (Cl⁻) was synthesized via an aqueous method using the dialdehyde 4,4′-biphenyldicarboxaldehyde and triaminoguanidine hydrochloride as reagents. The BDA-TG (Cl⁻) COF–C material was synthesized by carbonization of BDA-TG (Cl⁻) at T = 900 °C for 4 h under an atmosphere of CO 2 . Experimental results demonstrated that the as-prepared carbon material exhibits outstanding CO 2 adsorption and separation performance, with a specific surface area of 783 m 2 g −1 and a CO 2 adsorption capacity of 3.57 mmol g −1 at T = 273 K. The CO 2 /CH 4 adsorption selectivity was calculated based on the IAST model, ranging from 7.03 to 8.88. In the gas breakthrough experiment, the breakthrough time of CO 2 was prolonged by 25 min relative to CH 4 , demonstrating excellent CO 2 adsorption and separation performance.
Co 6 W 6 N has been prepared by a mechanochemical synthesis route and characterized by energy-dispersive X-ray spectroscopy (EDX), hot gas extraction analysis, powder X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS). In addition, group-theoretical methods were used to demonstrate the structural relation of Co 6 W 6 N to the rock salt type. Furthermore, the catalytic activity with regard to ammonia decomposition was investigated. It was confirmed that Co 6 W 6 N remains intact during ammonia decomposition.
The compound Cr51Ni23B168O337(OH)29 has been obtained through an explorative high-pressure/high-temperature experiment at 9 GPa and 1,200 degrees C. This borate crystallizes in the trigonal space group R 3 & oline; m $R\overline{3}m$ with the unit cell parameters a = 10.4387(1), c = 51.5121(1) & Aring;, V = 4,861.1(2) & Aring;3, and one formula unit per cell. The crystal structure is a complex framework, composed of corner-sharing tetrahedral [BO4] groups and edge-sharing [(Cr,Ni)O6] octahedra. In this contribution, the structural data and the infrared spectrum of Cr51Ni23B168O337(OH)29 are presented.
The new fluoride oxoselenate(IV) CeF[SeO 3 ] was synthesized from cerium dioxide (CeO 2 ), cerium metal (Ce), cerium trifluoride (CeF 3 ) and selenium dioxide (SeO 2 ) at 700 °C in appropriate stoichiometric ratios with a surplus of fluxing cesium bromide (CsBr) by utilizing corundum-embedded silica tubes. It crystallizes in the monoclinic space group P 2 1 / c with the lattice parameters a = 1805.14(9) pm, b = 707.83(4) pm, c = 838.26(5) pm and β = 97.049(3)° for Z = 12. Its crystal structure comprises three crystallographically independent Ce 3+ cations, which are surrounded by both oxide and fluoride anions in different ratios within polyhedra described as [(Ce1)O 6 F 4 ] 13− , [(Ce2)O 4 F 7 ] 12− and [(Ce3)O 10 ] 17− . The fluoride-bearing ones share common edges and faces to erect corrugated { ∞ 2 ${}_{\infty }{}^{2}\left\{\right.$ [Ce 2 O 5 F 3 ] 7– } sheets and so do the fluoride-free ones according to { ∞ 2 ${}_{\infty }{}^{2}\left\{\right.$ [(Ce3)O 5 ] 7– }. The alternating interconnection via common oxygen vertices leads to a three-dimensional { ∞ 3 ${}_{\infty }{}^{3}\left\{\right.$ [Ce 3 O 9 F 3 ] 15− } framework, whose structural stability is further enhanced by charge-compensating Se 4+ cations through connectivity via three distinct types of oxoselenate(IV) groups [SeO 3 ] 2– , easily identified by Raman spectroscopy depicting the four expected modes of these discrete ψ 1 -tetrahedral [SeO 3 ] 2– anions. Another structure description for CeF[SeO 3 ] highlights cationic { ∞ 2 ${}_{\infty }{}^{2}\left\{\right.$ [Ce 2 F 3 ] 3+ } compartments with (Ce1) 3+ and (Ce2) 3+ as well as anionic { ∞ 2 ${}_{\infty }{}^{2}\left\{\right.$ (Ce[SeO 3 ] 3 ) 3– } compartments with (Ce3) 3+ in alternating stacking along [100], which resemble very much the pure CeF 3 - and Ce 2 [SeO 3 ] 3 -structure sections to explain the large number of formula units ( Z = 12) for this rather simple composition (CeF[SeO 3 ]).
